65 



Family GRANATOCRINIDiE. 



GRANATOCRINUS SPHEROID ALIS, n. Sp. 



Plate VI, Fig. 31, summit view; Fig. 32, basal view; Fig. 

 33, lateral view, but the artist overlooked the 

 interradial sutures. 



Body small, subsphseroidal, moderately sunken in the inter- 

 radial areas, so as to give it a pentalobate aspect; greatest 

 width, at the upper third, where the diameter is greater than the 

 length ; broadly truncated above and concave in the central part ; 

 truncated below, and, when placed on its base, will rest on the 

 distal ends of the ambulacra; columnar facet large. 



Basal plates small and extend only slightly beyond the column. 

 Radials extend about two-thirds of the length of the body, with 

 distinct lateral sutures. Kegular interradials one-third the 

 length of the body and strongly incurved above. Azygous in- 

 terradial stands nearj}^ upright, above the level of the summit 

 of the other parts of the body, where it is pierced with the 

 azygous orifice. Pseudambulacra very gently expand, from the 

 base to the summit, and are distinctly convex above the thin 

 margins of the radials on each side. Pore pieces about thirty- 

 three on each side of a well defined mesial furrow, along which 

 their inner ends are erenate and from which they are directed 

 obliquely downward. Summit has a rather large central five- 

 rayed opening. Ovarian apertures large and situated on each 

 side of the point of each interradial piece, two of them extend- 

 ing to the azygous orifice. 



Found in the Kaskaskia Group, in Meade County, Kentucky, 

 and now in the collection of Win. F. E. Gurley. 



-9 G, 



