128 PROCEEDINGS OF TEE NATIONAL MUSEUM. vol.58. 



Family ELEPHANTIDAE. 



MAMMUT AMEBICANUM (Kerr). 



In Professor Holmes's paper of 1903 it was said that he took from 

 the spring at Afton at least 100 mastodon teeth. Many of these are 

 in the collections at the United States National Museum. Some were 

 illustrated in Holmes's report on plates 6 and 7. Figures of some 

 have been published by the present writer.^ All of these teeth are 

 stained brown or black and appear to have lost practically all of 

 their animal matter. The pores, however, are not filled with mineral 

 matter, and broken surfaces adhere strongly to the tongue. 



ELEPHAS COLUMBI Falconer. 



In the department of paleontology in the United States National 

 Museum are about a dozen teeth of this species which were secured 

 in the spring near Afton. These teeth include upper and lower teeth 

 of both the milk and the molar series. Some of them are finely 

 preserved. They are usually stained black and show the presence 

 of but little animal matter. Some are so thoroughly mineralized that 

 they ring on being struck. One of these teeth was fig-ured by Prof. 

 W. H. Holmes in 1903 ^ and by Dr. F. A. Lucas.^ Others have been 

 illustrated by the present writer.* Other teeth from this locality 

 are in the department of anthropology in the United States National 

 Museum. 



ELEPHAS IMPERATOR Leidy. 



In the United States National Museum there are three fine molars 

 of this species which were found in the spring near Afton. One of 

 these teeth, an upper last molar, was figured by Holmes in 1903;^ 

 and a lower molar was illustrated by two figures on his plate 8. 

 The same teeth were described by the present writer in 1914." 

 Apparently there was only one other tooth of this species found by 

 Holmes; these teeth therefore being presumably rarer than those of 

 E. columhi. 



In the Dyar Museum, Public Library, Kansas City, Missouri, is 

 a lower jaw which appears to belong to this species. In each ramus 

 there is a well-worn molar, apparently the second. The specimen 

 was presented by Mr. R. H. Harper, and was probably found in the 

 spring explored later by Professor Holmes. 



' Geol. Surv. Ind., vol. 36 ; Iowa Geol. Surv., vol. 23. 



» Rep. U. S. Nat. Museum for 1901, pi. 9, lower fig. 



»Md. Geol. Surv., Pleistocene, vol. 38. 



*Geol. Surv. Ind., vol. 36; Iowa Geol. Surv., vol. 23. 



s Rep. U. S. Nat. Mus. for 1901, pi. 9, upper fig. 



• Iowa Geol. Surv., vol. 23, p. 422, pis. 66, 67. 



