22 PROCEEDINGS OF THE AMERICAN ACADEMY 



the anal field. Beneath each of the small spinous pieces above the 

 arms is a pentangular piece, the inferior margins of which are pro- 

 longed into an acute angle, separating the openings into the body into 

 two equal parts, the upper portion of these pieces supporting the 

 spinous pieces above the arms, the lateral upper portion supporting a 

 piece on either side : these last pieces are prolonged downward, and 

 curved around the outer sides of the arm openings, the outer margins 

 of those touching each other form a closed ring, with the piece between 

 them around the summit, except on the anal side. The lower margins 

 are supported on either side by the upper margin of the inter-radial 

 pieces. On the anal side are two additional pieces, nearly square, 

 resting between the last pieces above described and the spinous pieces, 

 and the pieces described above as anal pieces. 



Arms. The openings into the body are five pairs ; the arms are 

 in all, probably, ten in number : their form is unknown. 



Column. Unknown. We are indebted to Professor J. M. Safford, 

 of Tennessee, for the beautiful specimen figured in his report. 



Dimensions : — 



Greatest diameter of basis .... 



Least " " . . . . 



Vertical height of calyx ..... 

 Lengtli of first radiids ..... 



Height of specimen 



Greatest diameter of calyx .... 



Geological Position and Locality. Eare in the upper beds of the 

 cavernous member of the subcarboniferous limestone, in Breckinridge, 

 Grayson, Edmondson, Plart, and Warren Counties, Kentucky. Ver- 

 tical range, so far as at present known, about sixty-five feet, reaching 

 from the base of the first sandstone of the millstone-grit beds to the 

 first white bed beneath. 



DiCHOCRINUS ELEGANS, Sp. NoV. 



Body. Viewed from above the outline of the summit is stellate ; 

 the deep gi'ooves between the arms and the anal side would produce 

 a sinuous stellate figure in any section above the calyx. The calyx 

 is somewhat basin-shaped, but it is much more erect than in D. symme- 

 tricus. The rounded form of the first radials is continued to the top of 

 the second piece above the arms, dividing the body into five prominent 

 ridges. 



