i8 



EXPEDITION ANTARCTIQUE BELGE 



Remarks : — Nos. 8g3, goo and 8g5 are particularly fine skulls, but, although they 

 obviously belonged to adult animais, the development of the sagittal crest is practically 

 imperceptible. 



As regards the différences, if any, between the skulls of the two sexes we know next to 

 nothing. The only skull labelled as that of a female which I hâve examined is no. 8g5. In this 

 the canines are smaller than are those of the maies, and, if this distinction be borne out by a 

 séries of spécimens, ail the skulls in the British Muséum will prove to be, as I hâve provisionally 

 labelled them, those of maies. It should be noted, however, that the dimensions of no. 44. 4.6.1 

 are somewhat intermediate in character.' 



There seems to be a tendency, variably exhibited in the différent individuals, but most 

 marked in no. 8g3, to the appearance of a distinct space between the last two cheek-teeth of the 

 u PP er J aw i n a manner which reminds me somewhat of the corresponding teeth in Otaria 

 (Eumetopias) stelleri, Fischer. 



