ORG A — PSEUDORCA — GLOBICEPHALUS. 113 



uteri internum. It is surrounded by vascular villi. 

 Tlie umbilical artery was injected with gelatine and 

 carmine. See upper figure opposite. 



The lower figure opposite shows the surface of the 

 mucous membrane of the gravid uterus. The surface 

 is reticulated and contains numerous crypt-like recesses 

 in which the villi of the chorion are lodged. 



11. Placenta. The chorion from the right uterine cornu of the 



same whale, injected from a branch of the umbilical 

 artery with gelatine and Prussian blue. The villous 

 surface is displayed. No fcetus was present in this 

 cornu, but the chorion was richly villous and vascular. 



12. Placenta. A portion of the umbilical cord of the same, 



showing pigmented amniotic corpuscles. 



lo. Ovary. The pavilion of the left Fallopian tube, into 

 which a quill has been inserted. The ovary of Orca, 

 showing the large corpus luteum. The vascular plexus 

 in the hilum of the ovary has been injected from the 

 ovarian artery and vein. 



14. Ovary. Another section of the corpus luteum in the 

 same ovary, with the vessels injected, showing the 

 vascularity of the corpus luteum. 



VIII. PSEUDORCA. (Pso.) 



Pseudorca, Relnh.ardt, Overs. Dan. Selsk. Fork., 1862. 



Colour black ; length about 14 feet ; dorsal fin about 

 middle of back, moderate height, falcate ; pectoral 

 fin narrow, falcate ; cranial and dental characters not 

 unlike Orca, except that fangs of teeth are cylindrical; 

 vertebral formula C^jD-^^^^hgCd^^^ — 50. Only one species 

 apparently, Pseudorca crassidens (Owen). Habitat, 

 Danish coast, Tasmanian seas. 



No specimen in Museum. 



IX. GLOBICEPHALUS. (Gl.) 



Globicephala, Lesson, N. Tab. du Regne Animal, 1842. 

 Globiocephalus, Gray, Zool. Erebus amd Terror, 1846. 

 Globicephalus, Van Beneden and Gervais, Osteogr. Get aces. 



Head rounded in front, skull elevated behind blow- 

 hole ; summit of nasals about the height of the 

 transverse ridge on vertex ; premaxilla? very broad 



8 



