264 Dr. J. E. Gray on Sea-hears. 



Fig. 8. Lateral view (ulnar) of carpal and metacarpal bones, right side*. 



Fig. 9. Dorsal view of metacarpals and phalanges, left fore foot. 



Fiff. 10. Lateral view (radial) of the same. 



Fig. 11. Inner view of bones of left hind foot. 



Fig. 12. Eiglit hind foot, tibular view. 



Fuj. 13. Tibial view of the same (the strigil bone being removed). 



Fore foot : — 



nl ulna. ps. pisiform. 



r. radius. mg. magnum. 



sc. scaphoid. im. unciform. 



I. lunar. vie. metacarpal. 



c. cuneiform. i^h. phalanx. 



Hind foot : — 



t. tibia. st. strigil bone. 



f. fibula. ic. internal cuneiform. 



cl. calcaneum. inc. middle „ 



ch. cuboid. .re. external „ 



sc. scaphoid. mt. metatarsal. 



as. astragalus. h. hallux. 



The numbers II. III. IV. V. indicate digits. 



XXX. — Additio7ial Notes on Sea-hears (Otariada3) . 

 By Dr. J. E. Geay, F.K.S. &c. 

 Professor Turner, of Edinburgh, has kindly left with me for 

 examination three skulls of a species of Sea-bear from " Tuesday 

 Bay, Desolation Island" (which is, no doubt, the Desolation 

 Land of the charts, on the south-west coast of Patagonia), and 

 a skull that was presented to the Anatomical Museum of the 

 University of Edinburgh by the late Professor Goodsir, who 

 received it, with the cranium of a Caffer, from Mr. C. Bell, as 

 a " seal-head from the Cape of Good Hope." 



The skulls from Desolation Island evidently belong to the 

 species Avliich I have described as Euotaria nigresccns^ the 

 usual Fur-Seal of the Falkland Islands and other parts of the 

 coast of South-west America. 



Two of the skulls are from adult animals, are without the 

 lower jaws, and have only a few worn and broken teeth, 

 having been rolled on the beach. 



The other skull is of a young animal, exactly similar to the 



* The mechanism of the grasping-action of the fore foot appears to bo 

 as follows : — The pisiform, by tlie contraction of the large palmar muscle, 

 is brought into a line with the long axis of the forearm ; the lU^xor 

 muscles contract ; but the third metacarpal cannot be brouglit into a 

 position of less than a right angle with the pisiform, owing to the 

 inipingenu'nt of the downward process of the unciform against the latter 

 bone •,'"the \ingual phalanges, however, of the two functional digits, free 

 to act, arc drawn down into apposition against the vicarious pollex. 



