EXTINCT MAMMALIA OF NORTH AMERICA. 433 



PRISCODELPHINUS. 



Priscodelphinus Harlani. 



7 V(sA,.v„ »(•».-,, Ilarlau: Jour. Acad. Nat. Sc. 1825, 232, PL XIV, Fig. 1 ; Eilinb. New Phil. Jour. 



1834, XVIII, 29 ; Trans. Geol. Soc. Penn. 1835, I, 77 ; Med. Pliys. Res. 1835, 281. 

 Priscodelphlnvs Harlani, Leidy : Pr. Ac. Nat. Sc. 1851, 327 ; 1853, 377 ; Anc. Fauna Neb. 1853, 



8; Cret. Rept. United States in Smiths. Trans. 1861, 1, note. Dana: Man. Geology, 1863, 



478. Cope: Proc. Ac. Nat. Sc. 1867, 144; 1868, 188. 

 Priscodelphiaus, Lyell : Prineiijles of Geo). 1854, 145; Man. Elem. Geol. 1855, 256. 



The species is indicated by an isolated vertebra, originally described and figured 

 by Dr. Harlan as pertaining to a Plesiosaurus from the cretaceous green sand of New 

 Jersey. Recognizing its cetacean character, from its reported origin I supposed it to 

 be the first evidence of the existence of cetaceans during the cretaceous period. Later 

 researches prove the fossil to belong to the middle tertiary period. The specimen 

 is a vertebra of mature age, and was obtained at MuUica Hill, Gloucester County, 

 New Jersey. The length of the body is a little over two inches ; the posterior 

 articular surface is twenty lines wide and seventeen in depth. The spinal arch is 

 lost. The width of the spinal canal just within its fore part is nine lines. The 

 length of a transverse process, with an articular facet for a rib, is seventeen 

 lines. 



A less complete dorsal vertebra and four caudals, from their relative proportions 

 supposed to belong to the same species, are from the miocene deposit of Shiloh, Cum- 

 berland Co., New Jersey, and are preserved in the Museum of the Academy. 



PriscodelpMnus Conradi. 



Ddpldnus Conradi, Leidy: Proc. Ac. Nat. Sc. 1852, 35. Cope: Ibidem, 1867, 144. 

 Priscodclpkiims Conradi, Qo\te : Proc. Ac. Nat. Sc. 1868, 188. 



Founded on vertebrte from the miocene of Virginia, and Charles Co., Maryland. 



Priscodelpliinns acutidens. 



Cope: Proc. Ac. Nat. Sc. 1867, 144, 146. 



Founded on a single tooth from the miocene of Charles Co., Maryland. 



Priscodelphiniis spinosns. 



Cope : Proc. Ac. Nat. Sc. 1868, 187. 



Indicated by vertebrce from the miocene formation of Charles Co., Md. 



Priscodelpliinus atropius. 



Cope : Proc. Acad. Nat. Sci. 1868, 187, 188. 



Indicated by vertebrae from the miocene formation of Charles Co., Md. 



Priscodelphinns stenns. 



Cope : Proc. Ac. Nat. Sc. 1868, 188. 



Indicated by vertebrae found with the above. 



55 



