212 BULLETIN UNITED STATES GEOLOGICAL SURVEY. [Voir. 



striated; interior of cells filled with a finely vesicnlar tissue; cups 

 polygonal, concave, elevated in the center and displaying numerous 

 radial lamellse." 



The calyces of the specimens discovered by Dr. Peale are a little 

 smaller and somewhat more irregular than those of the tj^pical forms, 

 and the whole corallum is also a little more delicate. The differences 

 between the two forms are, however, very slight ; but it is thought advis- 

 able, under the circumstances, to give a new specific designation to the 

 form here especially considered, and in its selection to honor the name 

 of the founder of the genus. It is proi)er to remark here that the coral- 

 lum of this form appears to have been entirely free, as Dr. Winchell 

 states his tyi^ical examples to have been, since the limestone matrix is 

 in immediate contact with the under surface. A small example of this 

 coral in the collection is evidently a young corallum. It consists of two 

 minute cialyces and a larger one surrounded by ten or eleven others of 

 nearly full size. This seems to indicate that the increase of the coral- 

 lum was in all directions from the center ; or that the natural tendency 

 to increase was no greater in one direction than in another. 



Dr. Peale found only a part of the fuU series of Carboniferous strata 

 to be present at the locality from which these specimens of Lej)to])ora 

 were obtained, and the fossils were found near the base of that local 

 series. He thinks the strata in question belong near the base of the 

 Carboniferous series ; but, aside from the presence of Leptopora, there is 

 no paleontological evidence that they represent the Subcarboniferous 

 group, as separable from the remainder of the great Carboniferous series. 

 On the contrary, some of the associated forms have hitherto been found 

 only in the Coal-measure strata of the Mississippi YaUey. The fossils 

 found associated with the Leptopora consist of a single example of Betzia 

 {Eumetria) uta Marcou, a small plicated undetermined species of EJiyn- 

 ■ chonella, a broken stii)e of Glauconome, like G. nereidis White, or G. tri- 

 lineata Meek, and a few segments of crinoid stems. 



In this instance there is a plain commingling of Subcarboniferous and 

 Coal-measure types ; and, so far as the paleontological evidence yet ob- 

 tained is concerned, we are not justified in referring the strata from 

 which the fossils were obtained to either group exclusively. 



ECHmODEEMATA. 

 Genus Granatocrinus Troost.* 



Granatocrinns lotoblastus White? 



Among the fossils brought in by Prof. St. John from the Teton Eange, 

 near the headwaters of Teton Eiver and just west of the common boun- 

 dary of Idaho and Wyoming, is a single example of Granatocrinns, which 



* Granatocrinus Troost, altliouglL closely related to Nucleocrinus Conrad, is worthy of 

 generic separation, as pointed out by Meek and Worthen, Illinois Geol. Eeports, vol. 

 ii, pp. 274 and 27.5 



