1. lOBODON. 9 



moderate; the petrose portion of the temporal bone very convex, 

 nearly hemispherical. 



Cutting- teeth f ; the upper middle o^es moderate, with a smaller, 

 rather compressed crown; the two others large, conical, like the 

 canines ; the lower pair small ; the two middle ones subcyliadrical, 

 rather internal, projecting forwards and rounded at the end ; the 

 outer ones rather larger, blunt. Canines pj, conical, curved, small, 

 the upper largest. Grinders ||, with large swollen roots ; the crown 

 triangular, subtrigonal, lobed ; lobes rather recurved at the tip, the 



Fig. 2. 



Lobodon carcinophaga. Skull and hinder grinder. 



larger lobe with one, or sometimes a second, small lobe in front, and 

 Avith three lobes behind ; the first upper one smaller, with a single 

 large root, the second, third, and fourth nearly equal, and the fifth 

 smaller and more compressed ; the second and third have the root 

 only divided at the base, the fourth and fifth have the root divided 

 nearly to the crown, and diverging ; the first under is smallest and 

 single-rooted, the rest are all similar, 2-rooted, the third being the 

 largest, and the fifth most compressed in the crown. The symphysis 

 of the lower jaw is very long. 



The teeth of the younger animals have a rather broader crown, 

 with rather shorter tubercles, a rugose surface with some smaller 

 tubercles on the inner side, near the base of the hinder lobes, but 

 separated from them by a groove. 



Body tapering behind. The fore limbs moderate, rather elongate, 

 triangular, hairy above and below ; toes 5, tapering, with a narrow, 

 thick, hairy web between them ; claws 5, elongate, acute, subequal. 

 The hind limbs large, broad, triangular, hairy above and below ; the 

 oiiter toes on each side of the foot very large, broad, rounded at the 

 end ; the three middle ones smaller, narrow, tapering, with a thick 

 hairy web between them ; the central one smaller and shorter ; all 

 clawless. Tail short, conical, depressed. 



Fur close-set, rather rigid, directed backwards, soft at the end ; 

 the hairs flat at the base, tapering to a fine point, without any under- 

 fur at the roots. 



Inhab. Antarctic Ocean. 



