224 



SHORTER CONTRIBUTIONS TO GENERAL, G.EOLOGY, 1921. 



The Cheyenne material contained in the 

 present collection comes from Champion (Wild- 

 cat) Draw, three-fourths mile south of Belvi- 

 dere (2222) , and hills between Spring Creek and 

 Soldier, 4 miles northeast of Belvidere, where 

 it is extremely abundant. 



Genus CARPOLITHUS of authors. 



Carpolithus belviderensis Berry, n. sp. 



Plate XLI, figure 4. 



This species is based on a single character- 

 istic specimen, which is entirelj" distinct from 

 anytliing previously described. It represents 

 a large pyriform pedunculate pyxidium 1.8 

 centimeters in length and 13.5 millimeters in 

 maximum diameter. The peduncle is curved 



and stout, about 1 centimeter in length. The 

 pyxidium is pointed proximad, widest and 

 flatly rounded distad. The sides are distinctly 

 fluted with twelve or thirteen rounded nodes 

 separated by shallow rounded sinuses. The 

 ribbing may indicate parietal placenta or a 

 loculicidal habit, although the latter alternative 

 appears to be negatived by the lid. 



It is possible that this conspicuous and char- 

 acteristic fruit may not have been a true 

 pyxidium and shed its seeds by loosening of the 

 lid, as in Eucalyptus, but that it was a capsule 

 like that of Papaver and the small parietal 

 seeds were discharged through openings be- 

 neath the so-called lid, which m.ay represent a 

 concrescent stigma. The specimen comes from 

 Stokes Hill, northeast of Belvidere (2220) . 



