38 



TRANSACTIONS OF THE WAGNER FREE 



The teeth consist of nine upper and five lower molars and five incisors, 

 and appear to have pertained to three different individuals. Seven of the 

 upper molars seem to have belonged to the same individual, young but 

 mature ; the teeth being but slightly worn. One of them measures along 

 the fore part of its outer curvature 112 mm. in length. Two other upper 

 molars appear to have belonged to an older and somewhat smaller indi- 

 vidual ; and the lower molars to a third, larger and still older individual. 

 The teeth have the sharper part of their roots broken away as if they had 

 been somewhat water-rolled, and their cavities are filled with indurated 

 gravel. 



Specimens of upper molars of the Horse found under similar circum- 

 stances as the preceding, when approximating in size more or less those of 

 the largest variety of the Domestic Horse, and exhibiting on the worn 

 triturating surface of the teeth a variably greater degree of folding of the 

 enamel than usual in the latter, have been supposed to belong to an indige- 

 nous extinct species, which was named by Dekay the Equus major. 



Other specimens of upper molar teeth, found associated with the former 

 or under similar circumstances alone, not differing in any respect from those 

 of ordinary varieties of the Domestic Horse more than the teeth of this do 

 among themselves, have been conjectured to indicate another indigenous 

 species, for which the name of Equus fraternus has been proposed. Ad- 

 mitting the probable former existence of these two indigenous species, 

 many specimens which have been found of intermediate character render it 

 impossible in many cases to separate or distinguish them. 



The remains of the Horse of the salt mine of Petite Anse, from their 

 relative size and the in general somewhat greater degree of complexity of 

 folding of the enamel in most of the upper molar teeth, we would refer to 

 the Equus major. 



The adjoining figure represents one of the specimens, an upper first 

 large molar tooth, in which the triturating surface presents no greater 



degree of folding of the enamel than is usual 

 in the Domestic Horse. The tooth presents 

 the following measurements : 



Length of crown at its back outer 



border, 50 mm. 



Fore and aft breadth of the tritura- 

 ting surface, ... 44 " 



Transverse breadth, . . . 30 " 



