10 PROCEEDINGS OF THE ACADEMY OF 



when licatod Ions: enough. Tlic ixlriss beads are green after cooling, 

 having been subjected to the oxidizing or the reiluction fire. 



Carbonate of soda dissolves it, forming a yellow mass in the 

 oxidizing, and a green one in the reduction flame. In acids the 

 suljstance is not soluble, except some iron with which it is con- 

 taminated. 



The further qualitative chemical examination indicated tlie 

 oxides of chromium, iron, and magnesium. 



For want of means the quantitative determination of those ele- 

 ments was not undertaken, but reserved for some future time. 



The mineral known under the name of chrome-ochre must not be 

 confounded with the above, for chi-ome-ochre is descrilied to be a 

 silicate of alumina, tinged with the sesquioxide of chromium. We 

 are also told that it is amorphous, and its occurrence on por- 

 l)liyrv near Ilalle, and near Waldenburg in Silesia, or on a conglo- 

 merate, as near Creuzot in France, sliows I tliink suflicient differ- 

 ences not to consider it to be identical with the California mineral 

 on the chromit'e. M3' impression is, that the mineral described 

 is a new species, and if so, I would propose to name it in honor 

 of Mr. John C. Trautwine, the first observer, Trautioineite. 



Prof. Cope remarked, that, through the kindness of Prof. B. F. 

 Mudge, he had an op})ortunity of examining additional specimens 

 of the turtle from the cretaceous of Kansas, .described by him in 

 the Proceedings of the Academy 1872 p. 129. The phalanges in- 

 dicated a large flip})er of the type of marine turtles. They are 

 more flattened than in tiie PropJuridfv so far as the latter are 

 known, and are proportionally larger. The genus and species were 

 named Toxochelya latiremia. 



January 14. 



The President, Dr. Ruschenberger, in the chair. 



Twentj'-seven members present. 



The following pajjcrs were offered for publication : 

 "Materials for the stud3' of the Phytophaga of the United 

 States." By G. R. Crotch, M.A. "Notes on tiie species of Bu- 

 prestidie of the United States." By G. R. Crotch, ^I.A. 



Prof. Cope made some observations on the structure and sys- 

 tematic |)Osition of the genus EobasHeus Cope. Uintatherium 

 Leidy and Dinocerai^ Marsh were names applied to allied Mam- 

 mals, so tiuit the same would probably apply to them also. 

 Tlu\y had both been originally referred to the rcriitnodachjJa. Ity 

 their describors, and subsequently Marsh had stated (Am. Journ. 

 Sci. Arts. July IS, 1ST2) that the species described by him 



