ON REMAINS OF MASTODONS FOUND IN TEXAS, 

 ANANCUS BRAZOSIUS AND GOMPHOTHERIUM CIM- 



ARRONIS 



By Oliver P. Hay 



Associate of the Carnegie Institution of Washington 



In the course of his paleontological work the writer has had the 

 opportunity to study many interesting remains of mastodons found 

 in Texas. It is proposed in this paper to describe those of two 

 species. 



A. ON ADDITIONAL SPECIMENS OF ANANCUS BRAZOSIVS HAY 



1. On a large molar found in Texas and now in the British Museum 



In 1886 Lydekker ^ under Mastodon cordiUet^m, recorded a third 

 molar, said to be an upper, which had been found at an unknown 

 locality in Texas, at some time before 1869. In the United States 

 National Museum is a well-made cast of this tooth which was pre- 

 pared at the British Museum of Natural History. This cast shows 

 distinctly that the first crest of the crown is supported by a single 

 fang, which extends wholly across the tooth. In an upper tooth 

 there would be present two fangs, the inner of which would sup- 

 port likewise the inner end of the second crest. It must be con- 

 cluded, therefore, that the tooth in question is the lower right 

 third molar. From the British Museum of Natural History the 

 writer has received photographs of this tooth and these are here 

 reproduced (pis. 1, 2). 



The molar is in a fine stage of growth and in a good state of 

 preservation. Wear due to mastication had attacked only slightly 

 the first and second crests. Apparently some of the enamel is 

 missing from the outer face of the hinder talon. The length of 

 the crown is 225 mm.; the width of the second crest is 90 mm. 

 Tlie cones of the outer ends of the crests possess buttresses which, 

 when meeting those of columns in front and behind, block the 

 valleys. At an early stage of Avear the cones and their buttresses 

 would present distinct trefoils, as is shown on the first crest. The 

 inner ends of the valleys are open and the inner cones of the first, 



> Cat. Foss. Mamm. Brit. Mus., pt. 4, p. 46. 



No. 2572.— Proceedings U. S. National Museum, Vol. 66, Art. 35. 



12051—25 1 



