228 Annals of the Carnegie Museum. 



Head of femur (No. 1 1034^). This specimen is only the articulating 

 surface of a femur, with so little of the adjoining parts attached, as to 

 make it difficult to decide to which side it belonged, although I am 

 inclined to think that it represents the right femur, but not of the 

 same individual as that to which the fragment No. 11034^ belonged, 

 being too large apparently to have been a part of the same bone. 



Suborder PROBOSCIDEA. 



Family ELEPHANTID.^. 



Genus Mastodon Cuvier. 



Some of the material is quite fragmentary, consisting of broken bits 

 of the cusps of teeth, the exact location of which could only be deter- 

 mined by the expenditure of time which may be more profitably 

 employed. Of these fragments, unidentified as to their locality in 

 the dental formula, we list Nos. 1 10336, c, d, and e. They are mere 

 chips. 



No. ii033(/ is the extremity of a small tusk, about 14 cm. in length, 

 and about 5 cm. in diameter where broken off. One side shows 

 considerable wear. 



No. 11033/? is a broken fragment of somewhat decomposed ivory, 

 representing a large tusk, which probably was derived from about the 

 middle of the tusk, which may have had a diameter of as much as five 

 or six inches. 



No. 11033?" is a portion of a right upper jaw, in which there is im- 

 bedded a greatly fractured and abraded posterior molar, so much 

 injured as to make the description of the cusps and valleys impossible. 

 The tooth has an antero-posterior length of 180 mm. and a greatest 

 breadth of 70 mm. It was long and relatively narrow. The frag- 

 ment gives no evidence that this tooth was preceded by another, and, 

 if such a tooth existed, it must have been separated from the one 

 behind it by a wide diastema, which would be an unusual occurrence. 



The most interesting specimen is a fragment of a right lower jaw of a 

 Mastodon, No. 1 10337. It discloses the presence of three teeth, of 

 which the hindermost is only represented by the anterior margin of 

 the vacant alveole. The middle tooth is greatly fractured. It had 

 an antero-posterior length over all of 127 mm. and a width of 65 mm. 

 There apparently were three transverse ridges of considerable height, 

 intercalated between which on the median line were accessory cusps, 



