232 EUMETOPIAS STELLERI STELLER's 'SEA LION. 



Eumetopiax differs from Zaloplim through the presence of a, 

 wide space between the fourth and fifth pairs of upper molars, 

 the less einarginatiou of the posterior border of the palatine 

 bones, the quadrate instead of the triangular and posteriorly 

 pointed form of the postorbital processes, the less relative 

 breadth of the posterior nares, and the larger size of the facial 

 angle; also through its much broader muzzle, the less degree 

 of the postorbital constriction of the skull, and its much less 

 developed sagittal crest. 



Eumetopias differs too widely from Callorlrinm and Arctoce- 

 plmlus, in dentition and cranial characters as well as in size and 

 pelage, to render comparison necessary. The genus is at once 

 distinguishable from all the others of the family by the wide 

 space between the fourth and fifth upper molars. In distribu- 

 tion it is restricted to the shores and islands of the North Pa- 

 cific Ocean, ranging from Southern California northward to 

 Behring's Straits. Its geographical representative is the Otaria 

 jiibata of the Southern Seas, which ranges from the equatorial 

 regions (Galapagos Islands) southward. 



EUMETOPIAS STELLERI, (Lesson} Peters. 



Steller's Sea lion. 



Leo marinus, STELLER, Nov. Comui. Petrop., xi, 1751, 360. 



PJioca julata, SCHEEBER, Saugeth., iii, 1778, 300, pi. Ixxxiii B (iu part only; 

 not P. jitbata, Forster, with which, however, it is in part con- 

 founded). GMELIN, Syst. Nat., i, 1788, 63 (in part ; = P. julata, 

 Schrebcr). PANDER &. D'Ai/rox, Skelete der Robben uud Lamaii- 

 tine, 1826, pi. iii, figs, d, e, /.HAMILTON, Marine Amphib., 1839, 232 

 (in part not the figure of the skull). 



Phoca (Otaria) julata, RICHARDSON, Zoo'l. Beechey's Voy., 1839, 6. 



Otaria jubaia, PERON, Voyage Terr. Austr., ii, 1816, 40. NILSSON, Arch. f. 

 Naturgesch., 1841, 329 (in part only ; includes also the true Otaria ju- 

 lala). ? VEATCH, J. R. Browne's Resources of the Pacific Slope, 

 [app.], 150 (probably only in part, if at all). 



Otaria stelleri, LESSON, Diet. Class. Hist. Nat., xiii, 1828, 420. J. MULLER, Ar- 

 chiv f. Naturgesch., 1841, 330, 333. SCHINZ, Synop. Mam., i, 1844, 

 473. GRAY, Cat. Seals in Brit. Mus., 1850, 47 ; Cat. Seals and Whales 

 in Brit. Mus., 1866, 60. SCLATER, Proc. Zool. Soc, Lond., 1868, 

 190. SCOTT, Mam. Recent and Extinct, 1873, 22. 



Phoca stelleri, FISCHER, Synop. Mam., 1829, 231. 



leri rests anteriorly on the mastoid processes and the points of the canines, 

 the points of the pterygoid hamuli being several millimetres above the plane 

 of rest, while in O. jiibata the skull in the same position rests posteriorly on 

 the pterygoid hamuli, which project 5 mra below a plane connecting the mas- 

 toid processes and the points of the canines. 



