I Eastern Pennsylvc 



237 



Of Mjlodon both bones with claws and teeth have been dis- 

 covered ; also teeth and bones of a large Tapirns, the teeth of 

 which retain their white highly-polished enamel The bones of 

 both Mylodon and Tapirus are daxk-colored, and the bone-cells 

 usually filled with iron pyrites. 



There are rodents of the existing genera Hesperomys, Fiber, 

 Sciurvs, Lepus, &c. The reptiles are serpents, tortoises and 

 batrachians of several species. A number of Coleoptera are 

 fortunately preserved, several of them Carahidce. Several spe- 

 cies of birds occur, including a turkey, snipe, «&c. 



The remains of Mylodon, Ursus and Tapirus have been 

 mostly obtained from the tough red clay directly under the 

 plant bed, but the remains of rodents, snakes, tortoises, birds, 

 plants and insects, are entirely confined to the plani^ bed. 



ther the bones or teett 

 sharp and well defined. 



rolled or water-^ 



but all i 



As far , 



investigations 



have progressed, the ( 



now afforded us the following species :— 



Mastodon Americanus Cuv., 1 : Mylodon, 1 ; Megalonyx, ? 2; 

 lapirus, 1 ; Equus, ] ; an undetermined ruminant ; an undetennmed 

 carmvore ; Ursus pristinus, and another undetermined species, 2 ; 

 ^undetermined Bat; Lepus, 1 ; Arvicola, 1 ; Sciurus, 1 ; Fiber 1 ; 

 ^esperomys, 1 ; ? undetermined rodents, 2; Coluber, 2 ; Jropido- 

 ^«tus, 1 ; Crotalus, 1 ; Cistudo, 2: Rana, 1 ; ? Turkey, 1 ; Smpe, 1 ; 

 makinor in all, 27 



ertebrates, 27; Coleoptera, 10; Plants, 10; total, 47 species. 

 '™" " " ^ February, 1871. 





