Holland: Fossil Mammals. 227 



Order UNGULATA. 

 Suborder TOXODONTIA. 

 Family TOXODONTID^. 



Genus Toxodon Owen. 



Toxodon burmeisteri Giebel. 



Among the fragments given me by Mr. Waring on shipboard are a 

 broken upper molar (No. 11034) and a fragmentary upper (?) premolar 

 (No. 11034a) which are referred to this species. The specimens were 

 carefully compared with the material in the National Museum at 

 La Plata, under the eyes of Dr. Santiago Roth, and I have no doubt 

 as to the correctness of the determination. Associated with these 

 teeth are some small fragments of other teeth, which no doubt belonged 

 to the same species, if not to the same individual, as they were picked 

 up at the same spot. They are mere flakes and chips. 



It should be noted in this connection that Professor Cope established 

 a species of Toxodon, to which he gave the specific name compressidens, 

 the type of which came from "the northeastern part of the Province 

 of Bahia," and therefore from the same general region as the material 

 upon which I am reporting. The type of Toxodon compressidens 

 Cope consists of "the incisors of the first and second places of the 

 upper jaw." As the material at my command does not permit of 

 comparison, belonging, as it does, to the molar and premolar series, 

 and, as it seemed on comparison with well-determined material not 

 to differ from the teeth of T. burmeisteri, I have determined not to 

 make a queried reference to Cope's species, which the locality might 

 suggest. I am the more persuaded not to do so, because Leidy^^ 

 reports Toxodon burmeisteri from a small collection of fossils obtained 

 in the northern part of Nicaragua, being represented therein by a 

 nearly complete molar tooth and two portions of a lower incisor. 

 Toxodon burmeisteri appears to have had a wide range extending from 

 Argentina to Central America. 



In addition to the teeth of which I have spoken there are fragments 

 of some other bones evidently representing Toxodon, and presumably 

 the same species. They are listed as follows: 



Fragment of symphysis of lower jaw (No. 11034/)) 



Two fragments of arch of dorsal vertebra (No. 11034c) 



Distal end of right femur (No. 11034(f) 



■■'^ Leidy, Froc. Acad. Nat. Sci. Philada., 1886, p. 276. 



