310 PEOCEEDINGS OP THE ACADEMY OF [1887. 



of Hlppotherium different from H ingenuum (Proc. 1885, 33), and 

 also seems sufficiently distinct from the corresponding tootli of the 

 many other species of the genus elsewhere found in America, to ren- 

 der it probable it pertains to an undescribed species. It is an upper 

 molar of an animal approximating the Ass in size, and larger than 

 H. ingenuimi. The triturating surface, represented in the accompa- 

 nying figure, exhibits a complexly folded condition of the enamel, 



quite different from that of the latter,(com- 

 pare figure in Proc. 1885, 33). The spe- 

 cies may be named Hipj)otlierkmi plica- 

 tile. Three lower molar teeth according in 

 size with the upper one were also received 

 ^^ "^~ / from Dr. Neal. An astragalus and frag- 

 ments of several other bones contained in 

 the former collection accord in size with 

 /a 1/ the teeth of H. j)liGatile, while an astrag- 

 -' alus received from Dr. Neal accords in- 

 size with the tooth of if. ingenuutn. 



Comparative and other measurements are as follows : 



H. pllcatile. H. ingenuum. 

 Upper molar, triturating surface : 



Breadth fore and aft 20im 19m?n. 



Breadth transversely ...... 23 " 17 " 



First lower molar : 



Breadth fore and aft 25mm 



Breadth transversely 14 " 



Intermediate lower molar : 



Breadth fore and aft 22mm 



Breadth transversely 12 " 



Astragalus: 



Breadth fore and aft 49mm 35mm 



Breadth transversely behind . 40 " 29 " 



October 18. 

 Mr. John H. Redfield, in the chair. 

 Nineteen persons present. 



October 25. 



The President, Dr. Jos. Leidy, in the chair. 



Twenty-four persons present. 



Preliminary note on a new mineral Species from Franklin, N. J. 

 Prof. Geo. A. Koenig called attention to his recent examination 

 of a mineral from the above locality which has not been heretofore 



