. Text book of vertebrate zoology. Vertebrates; Anatomy, Comparative. MAMMALS. 413 Sub-Order 3. Pinnipedia. Aquatic petitadactyl carnivores, with webbed feet fitted for swimming, incisors always less than §, p typically ^, m \, no differentiated carnassial; tail very short. The seals and their allies are mostly marine, although some ascend rivers, while one species occurs in Lake Baikal. The body is fitted for an aquatic life ; the basal portion of the fore limbs is imbedded in the general integument, while the web of the toes usually extends beyond the extremity of the clawed digits. The seal
. Text book of vertebrate zoology. Vertebrates; Anatomy, Comparative. MAMMALS. 413 Sub-Order 3. Pinnipedia. Aquatic petitadactyl carnivores, with webbed feet fitted for swimming, incisors always less than §, p typically ^, m \, no differentiated carnassial; tail very short. The seals and their allies are mostly marine, although some ascend rivers, while one species occurs in Lake Baikal. The body is fitted for an aquatic life ; the basal portion of the fore limbs is imbedded in the general integument, while the web of the toes usually extends beyond the extremity of the clawed digits. The seals are true carnivores, feeding upon fish, of which they destroy large numbers. The origin of the group is uncertain. The eared seals show considerable resemblances to the ursidse, while the true. Fig. 377. Harbor seals, Phoca vitulina, after Elliott. seals suggest an origin from some form like Lutra. So it may be that the group is polyphyletic, or again, the pinnipeds may have descended directly from the creodonts. The group first appears with forms allied to Phoca in the miocene, while walrus-like forms occur in the pliocene. The OtariiD/E or eared seals have a small external ear, and the soles of the feet naked ; teeth i \, c \, p |, m \ or \. Otaria includes sea-lions of the Pacific and South Atlantic; and the fur seals, most familiarly known from the northern Pacific. The , or walruses, have the ears without external pinnae, and the upper incisors developed into immense tusks. The species of Trichechus, one or two in number, are confined to the northern parts of both oceans. The Phocid^ lack external ears, have the soles of the feet hairy, the testes abdominal, the teeth p \, m \, and. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Ho
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