A treatise on zoology . edian tin ; , cartilagmous plate. With epidermal teeth, is strengthened with an annular cartilagenear which are placed a median ventral cartilage and a sty iformcartilage on either side (Figs. 17, 20). The rasping tongue itselfis suBDorted bv large cartilages. lew the auditory capsule, the basal region of the craniumand the styloid processes are continuous with a complex networkof cartilaginous bars situated in the wall of the f^^^,^^ing the gill-slits, and enclosing the pericardium itself. This is the branchial basket (Fig. 20). u. nf tbr^ In the Myxinoidea, both th
A treatise on zoology . edian tin ; , cartilagmous plate. With epidermal teeth, is strengthened with an annular cartilagenear which are placed a median ventral cartilage and a sty iformcartilage on either side (Figs. 17, 20). The rasping tongue itselfis suBDorted bv large cartilages. lew the auditory capsule, the basal region of the craniumand the styloid processes are continuous with a complex networkof cartilaginous bars situated in the wall of the f^^^,^^ing the gill-slits, and enclosing the pericardium itself. This is the branchial basket (Fig. 20). u. nf tbr^ In the Myxinoidea, both the roof and the side-wall, of thebrain-case are membranous (Figs. 21, 22, 23). The nasal surrounded by an apparently median cartdaginous capsuleattached by twostrips to the trabeculae. Cartilaginous ring,mostly incomplete, surround the long nasal tube. Bet^^een the 34 CYC LOS TOM ATA trabeculae extends a median plate Ijelow the pituitary canal. Thelateral plate, pierced by a wide fenestra, forms a subocular arch,. C i O s G !£ S £ c g =^-=-^ a^-s =. i r a . ^5^ g H « S ?f s •- ° -S •; ^ - -_ t- s aj . „-o c D S ~ r = - 5 ^ S o J = o = •-si 2^ and is continuous in front Avith two large bars whicli fuse to supporta powerful median ethmoid epidermal tooth. Cartilages supportthe three pairs of cirrhi, and the edge of tlie mouth. The branchial skeleton is represented apparently by two or SKELETON three paired bars in the wall of the pharynx behind the skull, twoof which are continued above into that part of the lateral platewhich corresponds to the styloid process of the lamprey, and one A o^hth. ^^ B.
Size: 895px × 2794px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology
