8. PAGOPHILUS. 25 



in front, just as in Pagomys faikhis ; but the jaws behind the dila- 

 tation diverge more from each other, leaving a wider space between 

 them at the hinder part. The form of the hinder angle of the jaAvs 

 is very similar in the two species. The orbit is rather smaller and 

 more circular ; for in P. fcctidus it is rather oblong, being slightly 

 longer than wide. The forehead appears, as far as one can judge 

 by the fragments, to be flatter and broader, and the nose rather 

 shorter.— (7ra.v, P. Z. S. 1864. 



The lower jaws short and broad ; the grinders thick, with abroad 

 thick central lobe, and nearly side by side (in the skulls of the young 

 animals). 



The following measurements show the difference between the two 

 species : — 



P. fcetkhis. P. nummidaris. 



in. 12ths. in. 12th3. 

 Length of lower jaw to hinder notch . . 2 11 17 



Length of lower jaw to end of dilatation. 1 Sg 1 ^d 



Length of upper teeth-line 1 3| 1 2 



Length of three grinders 2| 3 



Width at outside of hinder notch 19 17 



Length of orbit 1 8| 1 5 



The Phoca nummularis of Japan has been considered to be iden- 

 tical with Phoca Larr/lia of Pallas, from the east shore of Kamts- 

 chatka, the Phoca Chonsii of Lesson, and the Phoqne tigre of Kras- 

 chennenikow (which has been named Phoca tigrina by Lesson), on 

 the strength of their coming from nearly the same district ; but I 

 am not aware that specimens of any of the latter species exist to 

 verify the union and determine what are the species described under 

 these names. — Grag, P. Z. S. 18G4. 



8. PAGOPHILUS. 



Palate truncated behind ; fingers gradually shorter ; muzzle rather 

 produced ; hair dry, flat, close-pressed, without any under-fur ; web 

 between the hind toes baldish. Lower jaw with the branches diverg- 

 ing, dilated and inflexed beneath in front, so as to close in the front 

 part of the gidlet ; the angle acute, erect behind, with a notch above 

 the basal tubercle ; grinders rather distant. (Fig. 8.) 



Inhab. Northern Ocean. 



Callocephalus §, F. Cucier, 3Icm. 3Ius. xi. 1827. 



Pagophilus ( subgen. of Callocephalus), Grai/, Zool. Erehus i^f Terror, 3. 



Pagophilus, Cat. Phocidce B. M. 25. 



1. Pagophilus Groenlandicus. Harp Seal. 

 Grey or whitish, with large and small black spots ; hairs of the 

 beard waved on the edges ; the cutting-teeth diminish in size ; the 

 grinders separate, straight ; edge of the mouth oblicjue. Length from 

 4 to 5 feet. 



