360 MACRORHINUS. CYSTOPHORA. 



length, 9-10 feet; length of posterior flippers, i. 7-1. 10 inches; fore 

 flippers, 1. 2-1. 5 inches; tail, 2-2^ inches; tip of nose to corner of 

 mouth, "8 inches. Skull: occipito-nasal length, 245; of Hensel, 282; 

 palatal length, 141 ; from anterior edge of intermaxillae to pterygoid 

 hamuli, 205; greatest breadth of zygomata, 223; mastoid breadth, 

 1S2; length of nasals, 57; least interorbital breadth, 40; greatest 

 width of brain case, 50; length of lower jaw, 239; anterior edge of 

 ramus to last molar, 82. Specimen from San Cristobal Bay, Cali- 

 fornia; No. 21887, Coll. U. S. Nat. Mus. Washington. 



89. Cystophora. 



I. ?=?; c. i^; P. *^; M. i=i = 30. 



I— i' I— I 4—4' i-i -^ 



Cystophora. Nills, Skand. Faun., 1820, i, p. 382. Type C. borealis, 

 Ni/h, = Phoca crisiata, Erxl. 



Stcmmatopus. F. Guv. M6m. du Mus., 1824, xi, p. ig6. 



Nails on all the feet; adult male with an inflated skin extending 

 from occiput to end of nose, forming a kind of hood; palate short, 

 emarginate. Molars, except fifth upper pair, and sometimes also the 

 fourth, single rooted. Nasals short; palate broad, posterior edge 

 concave; zygomatic arch much curved; brain case short and broad, 

 occipital crests prominent. Audital bullae swollen, nearly straight in 

 adults. 



529. cristata. (Phoca), Erxleb. Syst. Reg. Anim. , 1777, p. 590. 



cucullata, Bodd, Elench. Anim., 1785, p. 107. 



mitrate, (Milbert MS.), G. Cuv. Oss. Foss., 3d ed., v, 1825, p. 

 210, pi. xviii, fig. 3. 



Iwfcalis, Nills. Skand. Faun., 1820, p. 383. 



leucopla, Thienem., Reis. Nord. Eur., 1824, p. 102. 



isidorei. Less, Rev. Zool., 1843, p. 256. 



Type locality. Southern Greenland. 



Geogr. Distr. Colder portions of North Atlantic; Arctic Sea. 

 Rarely found south of Newfoundland. 



Genl. Char. Head small, with a movable muscular bag on top, 

 extending from muzzle to behind eyes, nostrils placed in anterior 

 part of hood, muscular sac capable of inflation. No hood on female. 



Color. Above bluish black; sides and belly lighter, spotted with 

 whitish; head and limbs black. 



Measurements. Total length, 2190; fore limb, 480; hind limb, 

 420; tail vertebrae, 165. Skull: occipital condyle to end of premaxil- 

 laries, 285; Hensel, 250; zygomatic width, 224; mastoid width, 182; 

 interorbital constriction, 46. 



