192 SPECIMENS OF PINNIPEDIA. 



15. Placenta of the same Seal partially separated from the 



wall of the uterus, the mucous lining of which has 

 been exposed. 



16. Placenta of the same Seal, chorion and adjacent wall of 



uterus. The placental margin has the mucous coat 

 of the uterus reflected for a short distance tm to its 

 surface. 



17 Placenta of the same Seal, portion of the chorion beyond 

 the margin of the placenta. The blood-vessels, in- 

 jected blue, are sparingly distributed. 



18. Generative organs of a non-gravid female Grey Seal, 



with the vessels injected. The left ovary contains 

 a corpus luteum. The animal was captured at the 

 mouth of the Tay in 1870. 



19. Ovary of the Grey Seal, with the pavilion-like arrange- 



ment of the Fallopian tube. The ovary has been 

 bisected to show the corpus lateum. 



Subfamily II. CYSTOPHORIN.^. 



Anterior nares, upper part in vertical or almost vertical 

 plane, beak much prolonged in front of opening, 

 premaxilla not articulating with nasal ; greatest 

 width of palate immediately behind last molar ; 

 zygomata very bulging, width much more than 

 cranial breadth ; inner wall of orbit somewhat 

 defective ; pterygoids almost vertical. Basi-occipital 

 usually not perforated mesially. 



I. CYSTOPHORA. (Cy.) 



Cystophora, Nilsson, Skand. Fauna, i., 1820. 



Anterior nares in upper third or half bounded by 



superior maxilla; tympanic bulla very swollen, 



outer third rough and continuous with short external 



meatus, which opens outwards ; infra-orbital foramen 



opens on lower part of slope of anterior floor of 



orbit ; mastoid temporal prominent ; posterior edge 



of vomer articulating with palate in plane of 



.22 11 55 



posterior nares. Dentition : ni. - -, c. 7 v, P-c ^ -~ = 

 ^ 1111^5 5 



30. Crowns of post-canines small, laterally com- 

 pressed, faintly cuspidated. 



