372 Dr. Traill on American Animals of the Genus Felis. 



1. CJialk, with marine exuviae. 



2. First Frcsh-iscatcr Formation, consisting chiefly of plastic 

 clay, brown-coal, and sand. This is probably the same 

 with our brown-coal formation, and contains fresh-water 

 shells principally ; but in the upper stratum both fresh- 

 water and marine shells together ; of the latter, Ccrithia, 

 Ampnllarice and Oysters, in particular. 



3. First Marine Formation. Limestone and sand. The 

 characterizing shells here belong to the genera Ccrithinm, 

 Lucina, Cardita, Cardium, Voliita, Ovidites, Tinritella, Cij- 

 t/ierea, Crassatclla, and Corhula. 



i: Second Frcsh-ivater Formation, containing siliceous lime- 

 stone, gypsum and marie. The gypsum contains the well- 

 known bones of remarkable land animals ; but the marie 

 lying above it always contains the remains of marine ani- 

 mals, particularly Ceritliia, Cytherea and Oysters. 



5. Second Marine Formation ; compounded of gypseous-marle, 

 sand, sandstone, limestone and calcareous-marle. Here the 

 genera Oliva, Fiisus, Ccrithiiim, Mclania, Crassatella, Pec- 

 tunculus, Cijtherea and Ostrea are particularly found. 



6. Third Fresh-xvater Formation; consisting of marie and sand. 

 Our stratum of sand near Magdeburg must be referred, 



in all probability, to the second marine formation. 



A' 



LXXIV. Remarks on some of the American Animals of the 

 Genus Felis, particularly on the Jaguar, Felis Onca Linn. 

 By T. S. Traill, M.D. F.R.S.E. S)-c. * 



MONG the genera into which Linnseus has distributed 

 the higher animals, none seems more natural, or better 

 defined, than the genus Felis,- yet such are the vague descrip- 

 tions given by most travellers, and by the older naturalists, 

 that we are still in uncertainty respecting several of the species 

 which compose it. My attention has been particularly drawn 

 to this genus, by accidentally meeting with skins, and occa- 

 sionally with living animals belonging to it, which I have in 

 vain endeavoured to reconcile to the descriptions of authors ; 

 anti the magnificent collection of zoological drawings in the 

 possession of Lord Stanley has made me acquainted with se- 

 veral of the feline genus, which do not appear to have attract- 

 ed the attention of ouv best systematic writers. 



The feline animals belonging to the American Continent are 

 numerous, and have generally been ill described by naturalists. 

 Indeed there ajipears to be a singular |:»rejudice respecting 

 them in the minds of many zoologists. IJccause neither the 



From the Mcmoii:. of the Wciricrian Society, vol. iv, Part II. p, IfiS. 

 .^ • lion 



