SEA-I,IONS, AXU SEA-BEARS. 37 



1311a. Animal, very young, stuffed. 

 Skull of above, 



Arctocephalus falklandicus, Gei-rard, Cat. Bones, p. 147. 

 Falkland Islands. Presented by Sir J. Richardson. 



1013/. Animal, young, stuffed. 



Hah. Not recorded. Presented by General Hardwicke. 



1013^, SkuU, very young. (PI. XXIX.) Thelower jaw broken on 

 one side, with some of the milk-teeth left, and the other set 

 below the gums. Mus. Utrecht. 67. 4. 12. 2ij5. 



The milk-grinders in both jaws with lanceolate crowns and very 

 slight indications of side-lobes. 



The skull of E. nigrescens, which Mr. Abbott brought from the 

 Falkland Islands, is about 9 inches long ; but the occipital bone and 

 condyles are wanting, so I cannot be sure of its length. It is 

 5| inches wide at the condyles. The muzzle is comparatively 

 narrow. The upper cutting-teeth occupy 1 inch, and are very 

 similar to those of E. cinerea. The lateral cutting-teeth and canines 

 are elongate and moderately strong ; the outer sides of the canines 

 are 1| inch apart. The upper grinders have rather compressed 

 roots, and the three hinder have two very distinctly divided roots ; 

 the crowns are rather narrow and elongate. The series is 2-| inches 

 long. The palate with the suture between the broad pterygoid and 

 maxillary bones rounded in front of the hinder edge of the zygomatic 

 arch. The lower jaw is short, 6 inches long, widely diverging, as 

 wdde apart at the angles as the length from the angle to the gonyx. 

 The lower grinders with elongated crowns, and the series not quite 

 so long as in E. cinerea. 



In the very young skull of the Sea-bears (ArcfocejiTialus) the 

 hinder opening of the palate is far back ; but as the animal grows 

 the palate contracts behind, and the space between the hinder 

 grinder and the opening is considerably elongated and narrowed, and 

 the opening, which is broad and short in the young animal, becomes 

 narrow and elongate in the adult. 



In the palate the hinder opening of the nostrils is, in the very 

 young Sea-bear, much nearer to the condyle, and becomes further 

 from it as the animal grows older, so that the skulls of the very 

 young have an affinity in this respect with the skulls of the Otarice ; 

 but in the very youngest animal they are a considerable distance 

 behind the condyle. 



3. ErOTAElA LAnKOSTEIS. 



The upper cutting-teeth forming a broad line. 



lOlSd. Skull of adult, without lower jaw and without any teeth. 

 (PL XXVII.) The cavities for the canines very large, those for 

 the cutting-teeth forming a wide series, and of the grinders 

 small, narrow. 



Arctocephalus nigrescens, Proc. Zool. Soe. 1872, p. 656 (not figure). 

 Falkland Islands ? {Zool. Soc). 55. 12. 26. 167. 



