The present study was carried out to determine and describe the different morphological characteristics of some cephalopod species (squids or cuttlefishs). A total of 27 specimens (belonging to order Teuthoidea and Sepioidea) were collected from the Red sea around the aqua area near the National Institute of Oceanography and Fisheries – NIOF- Red sea branch during the period from February 2016 to June 2018. The morphological characters which have been studied were suckers of the tentacular club, suckers of the arms, teeth of the suckers of both arms or tentacles, shell (shape and type), funnel (siphon), type of the eye, fins, presence or absence of the hectocotylized arm (modified arm that characterize male) and presence or absence of the two nidamental and accessory nidamental glands (which characterize the females).

The present study was carried out to determine and describe the different morphological characteristics of some cephalopod species (squids or cuttlefishs). A total of 27 specimens (belonging to order Teuthoidea and Sepioidea) were collected from the Red sea around the aqua area near the National Institute of Oceanography and Fisheries – NIOF- Red sea branch during the period from February 2016 to June 2018. The morphological characters which have been studied were suckers of the tentacular club, suckers of the arms, teeth of the suckers of both arms or tentacles, shell (shape and type), funnel (siphon), type of the eye, fins, presence or absence of the hectocotylized arm (modified arm that characterize male) and presence or absence of the two nidamental and accessory nidamental glands (which characterize the females).

The present study was carried out to determine and describe the different morphological characteristics of some cephalopod species (squids or cuttlefishs). A total of 27 specimens (belonging to order Teuthoidea and Sepioidea) were collected from the Red sea around the aqua area near the National Institute of Oceanography and Fisheries – NIOF- Red sea branch during the period from February 2016 to June 2018. The morphological characters which have been studied were suckers of the tentacular club, suckers of the arms, teeth of the suckers of both arms or tentacles, shell (shape and type), funnel (siphon), type of the eye, fins, presence or absence of the hectocotylized arm (modified arm that characterize male) and presence or absence of the two nidamental and accessory nidamental glands (which characterize the females).

The present study focused on the morphological characterization of hemocytes of Sepiaofficinalis and the histological structure of its hemopoietic organ (white body). Haemolymph was collected from the branchial heart with syringe then blood smears were prepared and stained with Haematoxylin& Eosin (H&E).White body was dissected and fixed in Kahl’s fixative for histological studies also other pieces were fixed in glutardehyde for the preparation of semithin and ultrathin sections. Three main types of hemocytes were identified by light microscope: Hyalinoytes, granulocytes and agranulocytes.The histological structure of hemopoietic organ (white body) of cephalopods revealed that it is a multilobed organ enclosed by a thin fibrous connective tissue capsule that consists of collagenous fibers. Hemocytes within the white body were enclosed in a supportive connective tissue fibers that form a network of small unites in which hemocytes are grouped in clusters.

The present study focused on the morphological characterization of hemocytes of Sepiaofficinalis and the histological structure of its hemopoietic organ (white body). Haemolymph was collected from the branchial heart with syringe then blood smears were prepared and stained with Haematoxylin& Eosin (H&E).White body was dissected and fixed in Kahl’s fixative for histological studies also other pieces were fixed in glutardehyde for the preparation of semithin and ultrathin sections. Three main types of hemocytes were identified by light microscope: Hyalinoytes, granulocytes and agranulocytes.The histological structure of hemopoietic organ (white body) of cephalopods revealed that it is a multilobed organ enclosed by a thin fibrous connective tissue capsule that consists of collagenous fibers. Hemocytes within the white body were enclosed in a supportive connective tissue fibers that form a network of small unites in which hemocytes are grouped in clusters.

The present study focused on the morphological characterization of hemocytes of Sepiaofficinalis and the histological structure of its hemopoietic organ (white body). Haemolymph was collected from the branchial heart with syringe then blood smears were prepared and stained with Haematoxylin& Eosin (H&E).White body was dissected and fixed in Kahl’s fixative for histological studies also other pieces were fixed in glutardehyde for the preparation of semithin and ultrathin sections. Three main types of hemocytes were identified by light microscope: Hyalinoytes, granulocytes and agranulocytes.The histological structure of hemopoietic organ (white body) of cephalopods revealed that it is a multilobed organ enclosed by a thin fibrous connective tissue capsule that consists of collagenous fibers. Hemocytes within the white body were enclosed in a supportive connective tissue fibers that form a network of small unites in which hemocytes are grouped in clusters.

ABSTRACT Histological and histochemical techniques were used to study the structure of the ink apparatus and the funnel organ of the squid Sepioteuthis sepioidea (Blainville, 1823). The ink apparatus is composed of ink sac, ink gland and ink duct. The wall of the ink sac consists of four layers: outer connective tissue capsule, muscularis, sub-mucosa and mucosa. The Ink gland lies at the base of the ink sac and consists of basal (caudal) and apical regions. The ink gland is composed of numerous interconnected, sponge like lamellae traversed the cavity of the gland. These lamellae are consisted of connective tissue covered with one layer of glandular epithelium. The duct of the ink sac consists of an outer connective tissue layer, muscular layer and lined with a single layer of epithelial cells. In general the ink produced by cephalopods is secreted from two glands: ink gland which produces a black ink containing melanin and the funnel organ (a mucus-producing gland) which located on the internal surface of the funnel. The funnel organ consists of two lateral pads and a median pad that has the same histological structure. The lateral pad consists of epithelial and sub-epithelial layer. The epithelial layer is composed of a single layer of columnar cells, while the sub-epithelial layer contains many secretory cells.

ABSTRACT Histological and histochemical techniques were used to study the structure of the ink apparatus and the funnel organ of the squid Sepioteuthis sepioidea (Blainville, 1823). The ink apparatus is composed of ink sac, ink gland and ink duct. The wall of the ink sac consists of four layers: outer connective tissue capsule, muscularis, sub-mucosa and mucosa. The Ink gland lies at the base of the ink sac and consists of basal (caudal) and apical regions. The ink gland is composed of numerous interconnected, sponge like lamellae traversed the cavity of the gland. These lamellae are consisted of connective tissue covered with one layer of glandular epithelium. The duct of the ink sac consists of an outer connective tissue layer, muscular layer and lined with a single layer of epithelial cells. In general the ink produced by cephalopods is secreted from two glands: ink gland which produces a black ink containing melanin and the funnel organ (a mucus-producing gland) which located on the internal surface of the funnel. The funnel organ consists of two lateral pads and a median pad that has the same histological structure. The lateral pad consists of epithelial and sub-epithelial layer. The epithelial layer is composed of a single layer of columnar cells, while the sub-epithelial layer contains many secretory cells.

ABSTRACT Histological and histochemical techniques were used to study the structure of the ink apparatus and the funnel organ of the squid Sepioteuthis sepioidea (Blainville, 1823). The ink apparatus is composed of ink sac, ink gland and ink duct. The wall of the ink sac consists of four layers: outer connective tissue capsule, muscularis, sub-mucosa and mucosa. The Ink gland lies at the base of the ink sac and consists of basal (caudal) and apical regions. The ink gland is composed of numerous interconnected, sponge like lamellae traversed the cavity of the gland. These lamellae are consisted of connective tissue covered with one layer of glandular epithelium. The duct of the ink sac consists of an outer connective tissue layer, muscular layer and lined with a single layer of epithelial cells. In general the ink produced by cephalopods is secreted from two glands: ink gland which produces a black ink containing melanin and the funnel organ (a mucus-producing gland) which located on the internal surface of the funnel. The funnel organ consists of two lateral pads and a median pad that has the same histological structure. The lateral pad consists of epithelial and sub-epithelial layer. The epithelial layer is composed of a single layer of columnar cells, while the sub-epithelial layer contains many secretory cells.

Abstract The effects of the aqueous extract of Acacia nilotica and Cuminum cyminum for the control of the brown garden snail "Eobania vermiculata" and the clover land snail "Monacha obstructa" were studied under laboratory conditions. The highest mortality rates were recorded at 25% concentration of Acacia nilotica for both species, 23% and 20% of Cuminum cyminum concentration for the two species, respectively. The extract of Acacia nilotica caused the appearance of black material on the snail shell. The treated snails showed histological alterations in the digestive and salivary glands. The digestive cells were shrunken or completely degenerated. The lumen of the digestive tubules increased in width and filled with secretory materials. Mucocytes of the salivary gland showed great destruction.