Beepe.| Carboniferous Invertebrates. 31 



one-third within the calyx, broadest above ; height one and 

 one-half times the width. 



A portion of the vault of this specimen remains, somewhat 

 crushed down into the calyx. It appears to have been in the 

 form of a pyramid, about as broad as high, composed of rather 

 heavy plates, which were rather rough. It appears to have 

 been rather angular, though it may have been conical. Several 

 rather irregular plates are preserved, three of which seem to be 

 from around the aperture ; they are rather massive, five- or 

 six-sided, nearly smooth on the exterior ; articular surfaces are 

 deeply faceted and roughened, while the articular surfaces of 

 the other plates of the sac are milled. 



Height. Width. 



Column segments 1 to 1.1 mm. 4.1 mm. 



Infrabasals 1 " 3 " 



Three anterior basals 8 " 9 " 



Right posterior basal 91 " 11 " 



Posterior basal 9 " 71 " 



Radial 9 » 19" " 



Radianal 8.1 " 11 " 



Interradial 71 " .71 " 



Anal 8 " 11 " 



Calyx 7 " 3G " 



Range and distribution : The specimen is labeled, " From the 

 Upper Coal Measures; Kansas City." University of Kansas 

 Museum. 



It is impossible to locate the specimen generically with any 

 degree of certainty without having more of the specimen pre- 

 served. The ventral sac seems to have been angular and the 

 stem round. For this reason it is left with Zeacrinus. The up- 

 per extremities of the radials do not meet, but leave a small 

 aperture, which seems to communicate in life with the general 

 body cavity. I know of no Coal Measures crinoid with which 

 it is likely to be confounded. 



