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Show 608 DR. J. MURIE ON A N E W TAPEWORM. [June 23, left lung presented a slight incision or was very partially divided two lobes. Tbe tongue, as is usual in the Seals, was terminally split rather than forked. The dorsal papillae were very numerous and of small size. The oesophagus had a length of 16 inches. As is the case in the Common Seal, the rather capacious stomach was cylindroid, and with the pyloric bend sharp; its long diameter was 11 inches. The small intestines from the pylorus to the caecum measured 41 feet 5 inches, with an average diameter of ^ an inch. As in Phoca generally, the caecal diverticulum is simple, short, and wide. Including \ an inch of caecum, the great intestines had a length of 18| inches ; their diameter, f of an inch at the caecal end, gradually enlarges towards the vent, and is 1\ inch at the rectum. The entire alimentary tube at this stage of growth is therefore about 45 feet 2\ inches long. The deeply divided liver precisely corresponds as to disposition, number, and size of the lobes, with those of the Ringed Seal (P. fcetida, Miill.) and to the Common Seal (P. vitulina); namely, there are five large elongate taper-pointed hepatic divisions, and two lobules - in all, seven lobes. The two to the left are the homologues of the left half of human anatomy ; and the right half is represented by the three remaining large lobes ; of these three the mesial two are equivalent to Professor Owen's cystic lobe. The Spigelian and caudate lobules are relatively small. The common bile-duct, derived from the pyriform gall-bladder, opens into the intestine an inch distant from the pyloric orifice. The kidneys are compound or acinate ; and externally large veins ramify superficially upon the renal capsule, as is the case in the Common Seal. The generative organs comport to the type of Pinnipedia. The prostate gland is of moderate size ; Cowper's glands are absent. In passing, I may note that the vertebral formula is :-7 cervical, 15 dorsal, 6 lumbar, 4 sacral, and 13 caudal segments, or a total = 45 vertebras. Terminal caudal elements are often lost in museum skeletons ; but in this case they were counted whilst attached by intervertebral substance and ligament. 7. O n a probably new Species of Tcenia from the Rhinoceros. B y J A M E S M U R I E , M.D., F.L.S., F.G.S., & c , late Prosector to the Society. The Cestoida, abundantly numerous among tbe ruminant section of the Artiodactyla, are by no means so common or well known in the non-ruminant division of that group. Regarding the Perisso-dactyla, its few families and genera have as yet not yielded many varieties of these Entozoa. In the very lucid and capitally illustrated ' Introduction to Hel- |
