PHOCA — HALICHCERUS. 189 



7 J; inches ; breadth, cranial 3 inches. No mandible. 

 Teeth, post-canines with secondary cusps. Tympanic 

 bulla smooth. 

 North Atlantic. 



9. Skull, adult, much broken. Length 9 J inches, over vertex 

 12 A inches ; breadth, zygomatic 5 inches, cranial 4§ 

 inches. Mandible, length 6 inches. Teeth worn. 



Donor — Mr Jas. Simpson. 



10. Skull, disarticulated, of young Bearded Seal. 



11. Os penis, GJr inches long; girth at base 3^ inches; prob- 



ably from Fhoca harhata. 



II. HALICH(ERUS. (Hal.) 



Halichoerus, Nilsson, Fauna Skand., i., 1820. 



Cranium only about one-third the length of |the skull ; 

 facial part proportionally large and broad, orbits 

 large, interorbital region thick ; molars conical, length 

 and breadth about equal, mostly single-rooted. Pre- 

 maxillse articulate with nasal. 



(1) Halichgerus grypus. (Hal. gr.) 



(Grey Seal, North Sea, Xortli Atlantic.) 

 Phoca grypus, Fabricius, Skr. Nat. Selsk., i., 1790. 

 Halichcerus grypus, Nilsson, Kongl. Vet. Akad. Handl. 



Stockholm, 1837. 

 Phoca gryphus, Fischer, Syn. Mamm., 1829. 



Colour, silvery grey to yellowish white, with dusky or 

 blackish spots ; in the very young, yellowish white 

 with grey stripes ; when some months old the tint 

 is slate-grey with black spots. Length about 8 feet 

 in male, from 6 to 7 feet in female. Manus with 

 first and second toes longest; pes, outer toes with 

 long lappets, nails well developed. Interorbital 

 constriction swollen about the middle ; occipital and 

 sagittal crests distinct; tympanic bullae swollen, 

 generally smooth but with an external ridge pro- 

 longed into wall of meatus ; basi-occipital usually not 

 perforated mesially. Anterior nares high, capacious. 

 Hard palate crescentic at posterior border in front of 

 hamular pterygoids. Mandible with small vertical 



