444 EXTINCT MAMMALIA OF NORTH AMERICA. 



Coelogenys paca. 



Osteo2>era jilati/cepJiala, Harlan : Fauna Americana, 1825,126. Meyer: Palseologica, 1832, 58. 

 Pictet: Palcont. 1853, I, 254. Brouu : Leth. Geog. 1856, 1047. 



Pliyseter macroeeplialus. 



Jiccenl Sjjcniiaccti W/uik, on the authority of Harlan : Am. Jour. So. 1828, XIV, 186 ; Edinb. 



New Phil. Jour. 1834, XVII, 361 ; Med. Phys. Res. 1835, 278. 

 3Iegistosaurns, Godman, according to Harlan: Am. Jour. Sc. 1828, XIV, 186; Edinb. New Phil. 



Jour. 1834, XVII, 361 ; Med. Phys. Res. 1835, 279 ; Trans. Geol. Soc. Penn. 1835, I, 47. 

 Nephfodcon, Rafinesque : Atlantic Journal, 1833, 12. See Harlan as just quoted. Pictet: Traite 



de Paleont. 18;53, I, 386. Giebel : Fauna d. Vorwelt, 1847, 1, 236. 



Of uncertain reference. 



Rorqualis australis, or Balxnoptera, DeKay : Nat. Hist. N. York, Pt. I, Zool., 1842, 131, 132, PI. 

 33, Fig. 4. 



A skull, fifteen feet long, dug up near Balize, Louisiana, probably of a recent 

 animal, was supposed by Dr. Ue Kay to be the same as the Rorqual of the Cape of 

 Good Hope. The figure given by Dr. De Kay, if correct, certainly indicates a dif- 

 ferent animal from the Rorqual. It represents the roof of the mouth or palate 

 decidedly arched, which is not the case in the latter. The arching is slight com- 

 pared with the condition in the Right Whales, indicating the possession of a short 

 baleen as in the Finners, but to which of these it belongs the means of information 

 are too meagre to ascertain. Probably the skull belongs to an undescribed species 

 now living in the Gulf of Mexico. 



Fictitious Fossil. 



Rliinoceroidcs Alleghaniends, Featherstonehaugh : Month. Am. Jour. Gcol. 1831, 10, PI. Harlan : 



Edinb. New Phil. Jour. 1834, XVII, 353. 

 Rhinoceros AUeffhanensiK, De Blainville : Ost. Gen., Rhin. 172. 

 TropoJon, Rafinesque : Atlantic Journal, 1832-3, 114. 

 Founded on a fragment of sandstone rock with several projecting pebbles, which 

 were mistaken for incisor teeth. According to De Blainville, who says " c'est sans 

 doute une piece artificielle," the specimen is preserved in the Museum at Paris. Ost. 

 Gen., Rhin., 173. 



• Additional notice of Remains of Mammals. 



The remains of a number of mammals have recently been described by Prof Cope, 

 in the Proceedings of the American Philosophical Society, but the publication of 

 them was not ijiade in time to be noticed in their proper place in the foregoing 

 Synopsis. 



The following remains of huge Rodentia, from the island of Anguilla, W. I., are 

 indicated on page 407 of the Synopsis : 



