38 HAND-LIST OF SEALS, MORSES, 



The length of the line of tlie cutting-teeth enlarging to any consi- 

 derable extent is inconsistent with what we know of the difference 

 between male and female, and of the changes that occur in these 

 teeth during growth of the animal. Therefore I believe that this 

 skull may belong to a diiferent species from any of which we have the 

 skulls already. 



The habitat, being that noted in the Museum of the Zoological So- 

 ciety at a time when habitats were not particularly observed, may be 

 erroneous. The skull may belong to the Arciocej>hah(s falklandicus, 

 of which the skull is not known, or it may be a distinct species. 



It was from this skull that I thought tlie width of the series of 

 the cutting-teeth was the character of A. nigrescens (P. Z. S. 1873, 

 p. 655), but I think it is better to take the character of the species 

 from a well-ascertained skull. 



The skuU without lower jaw(1013 J) is 9| inches long and 5| inches 

 Avide at the condyles, and is without any teeth ; the cavities for the 

 upper cutting-teeth are very distinct and occupy a line of 1| inch, the 

 outer ones being larger and compressed ; the front of the upper jaw is 

 much broader than in E. cinerea or E. iiic/rescens. The cavity for the 

 canines is large and circular, and the outsides of the canines are 2:j inches 

 apart. The series of grinders occupy a line 2^ inches long : the cells 

 left for the first three arc broad, oblong, and of the last three are 

 compressed, divided into two cavities by a central cross septum, of the 

 sixth very small ; they are like A. cinerea, but rather smaller. The 

 palate with the suture between the rather narrow pterygoid and 

 maxillary bones rounded in front, and level with or rather behind 

 the hinder edge of the front of the zygomatic arch. 



The skull of this species is figured in an unpublished plate of the 

 ' Zoology of the Erebus and Terror,' and described P. Z. S. 1 859, 

 pp. 1()7 & 300, Ann. & Mag. Nat. Hist. 1868, i. p. 106. 



** SkitU eJotigate, zi/gonka fiat externaUy. Palate of the adult skull gra- 

 dualhj and slighth/ narrowed behind the last grinder. Opening of the 

 internal nostril broad, rounded in front. 



4. EUOTARIA COMPRESSA. 



Skull elongate, zygoma flattened at the sides ; palate broad, gra- 

 dually wider behind to the end of the last grinder, then slightly 

 narrowed, with a large broad internal opening to the nostrils, which 

 is rounded in front. The last upper grinder rather distant from the 

 others, and directed backwards. 



1020(7. SkuU of an adult male, 9 1 inches long, 5^ inches wide. 

 Forehead much broken. Canine teeth and outer upper grinders 

 large. (PI. XXIY.) 

 South Africa? (Wanvicl-). 48. 10. 12. 22. 



5. EtrOTARIA SCHISTHYPEROES. 



Arctocephalus schisthyperoes. Turner, Journ. Anat. 1868, p. 113, 



tig. (front of palate). 

 A. schistuperus, GUnther, Zool. Hecord. 1868, p. 20. 



