478 PAL,E)NT0L0GICAL REPORT OF GEOLOGICAL SURVEY. 



nates at the commencement of the upward curvature of the points of 

 the pieces. The piece to the right of the anal pieces is larger than the- 

 others, and the first primary radial rises from its truncated point; in 

 this respect the drawing is imperfect — the side toward the anal pieces 

 should be more elevated. The surface of all the pieces is smooth. 



Primary radials five; somewhat heart-shaped; concave above, round- 

 ly pointed below ; the pieces on either side of the anal pieces are not 

 symetrical — the side of the left hand one having lost a portion of its 

 edge, against which rests one of the anal pieces, while that on the right 

 side has lost a portion of its inferior left margin, which joins the largest 

 anal piece. 



The primary radials of the second series* are five in number; sub- 

 quadrangular; width, equal twice the greatest heighth ; differing in form 

 and size ; sides square and vertical ; swelling rapidly from the sides 

 toward the center ; curved upwards on the superior margin, and termi- 

 nating in a rounded prominent knob ? at or near the center of the 

 pieces. 



Secondary radials {axilary, Miller,) ten; four are larger than the 

 others; similar in form to the primary radials of the first series invert- 

 ed; boldly prominent, each supporting two secondary radials of the 

 second series; the six others differ in form, and are less than half the 

 size of the first four, each supporting a single piece of the secondary 

 radials; slightly prominent., 



Secondary radials, second series, consists of fourteen subquadrangu- 

 lar pieces, differing slightly in size; less prominent than the first series, 

 from which the arms take their origin. 



Arms fourteen, composed of a double row of pieces, slightly rounded* 

 fitting deeply into each other — the salient angles of the right hand row 

 entering the retreating angles of the opposite row. 



Remarks. — Our specimen has been slightly crushed; the superior 

 ends of the arms are broken off; the calyx is remarkable for the depth 

 of the columnar depression, and the prominence of the rounded knobed 

 terminations of the pieces forming it, also, in having fourteen arms — - 

 the typical form of the genus having only ten. It was found in the 

 calcareous beds, near the base of the millstone grit of Crittenden coun- 



* The primary radiala of the second serie3 are here equivalent to the scapular pieces of Mil- 

 ler, corresponding to the scapular pieces of Encrinites moniliformis. 



