STRUCTURE OF HOOKER'S SEA-LION. 371 



of the ear to the head are about the same as in 0. hookeri. The ear in the three species 

 0. pusilla, 0. hookeri, and 0. gillespii appears to me to be also decidedly narrower in 

 proportion to its length than in 0. jubata. Dr. Burmeister, in a paper l upon Arctoce- 

 phalus hookeri, refers to the length of the ears in that species as contrasted with 

 Otari a jubata. 



Another character to which I wish to direct the attention of the Society is the form 

 of the nose (which is illustrated in the accompanying drawings, figs. 1-7) in the four 

 species already referred to. In the lateral views the nose of Otaria jubata is seen to 



Fig. 2. 



Head of Otaria jubata. 

 (One fourth of the size of nature.) 



be distinctly larger than in the other species, and in the front views the breadth is 

 considerably greater. In fact the external characters of the nose in these Otariidae seems 

 to divide them into two groups, which are also to be distinguished by the characters of 

 the ear. 



1 " Notes on Arctocephalus Hookeri, Gray," Ann. & Mag. Nat. Hist. ser. 4, vol. ix. (1872) p. 89. 



