30 OTA.RIAD.E. 



doubt, a small rudimentary tooth has fallen out ; and there is a much 

 wider but shallow pit on the other side, which may have been pro- 

 duced by the loss of a rudimentary tooth ; the last upper grinder 

 has a large swollen undivided root. If this is a young skull of 

 Eumetopias monteriensis, that species is curious for having the teeth 

 in the old and young skulls in the same situation as regards the 

 bones of the face. 



The adult skull and the young one were from the same locality, 

 and, I believe, collected by the same person ; and this being the 

 case, I am inclined to regard them as the same, only showing a 

 curious peculiarity in the growth of the animal, and also showing 

 that the form and position of the' hinder nostril probably varies as 

 the animal increases in age. 



Mr. Gill considers Steller's Sea-bear (Callorhinus ursinus) to be 

 the type of M. F. Cuvier's genus Ar otocephalus, and therefore abo- 

 lishes Callorhinus and gives the new name of Halarctus to the true 

 Arctoeephali — thus unnecessarily adding to the confusion of the 

 generic names of these animals. He fell into this mistake by not 

 observing that Phoca ursina, and even Otaria ursina, had been 

 applied to several species from very different localities, that F. 

 Cuvier established his genus on the skull of P. ursina of Forster, 

 from the Cape, which he (M. Cuvier) had named Phoca Delalandii, 

 and that'F. Cuvier does not figure a skull of the Sea-bear of Steller : 

 indeed the French collection did not at that time, nor does it even 

 now, possess one ; and I feel assured that, if it had, F. Cuvier would, 

 according to his custom, have established for it a genus distinct from 

 Arctocephalus, the skulls of the two genera being of such distinct 

 forms. 



1. Eumetopias Stelleri. Northern Sea-lion or Fur Seal. 



Arctocephalus monteriensis, Gray, Cat. Seals Sf W. p. 49 ; P. Z. S. 



1859, t. 72 (skull). 

 Eumetopias californiana, Gill, Proc. Essex Inst. 1866, v. p. 13. 

 Otaria Stelleri, Gray, Cat. S. Sf W. p. 60 ; Peters ; Midler ? 

 Otaria (Eumetopias) Stelleri, Peters, Monatsb. 1866, pp. 274 & 671. 

 Eumetopias Stelleri, Gray, Ann. Sf Mag. 1866, vol. xviii. p. 233 ; 



Allen, Bull. Mus. Comp. Zool. vol. ii. pp. 44, 46, tab. 1 & 2 



(skull &c). 

 Leo marinus, Steller. 



Phoca jubata, Pander Sf U Alton, t. 3. f. d, e,f (skull, not good). 

 Junior. Arctocephalus californianus, Gray, Cat. S. Sf W. p. 51 (skull 



only). 



Inhab. California ; Behring's Straits. 



The skin of the young specimen which Mr. Gurney gave to the 

 Museum along with what was said by Mr. Taylor to be its skull 

 (see ' Cat. Seals & Whales, p. 51) was the only skin then known to 

 exist in museums ; and consequently I described the fur of the genus 

 from this skin as having abundant under-fur (see Proc. Zool. Soc. 

 1859, p. 358). Dr. Peters having discovered Pander and D'Alton's 

 animal and skull in the Paris Museum, he observed that the adult 



