INDIANA PAL.CONTOLOGY. I50. 



The basal funnel is rather large and surrounded by a low ridge. 



The columnar canal is quite large and of the usual shape. A shallow de- 

 pression involves the greater part of the first radials. 



The body is considerably constricted below the arm bases. 



There are sixteen arms arranged thus: 4, 4, 3, 2, 3, end there are two res- 

 piratory pores to the arm. 



The anal tube is small and nearly central. The arm lobes are strongly 

 separated by the depth of the inter-ambulacral areas. 



The plates of the dorsal cup are as usual in the genus, as to number, 

 varying in proportional width and length to conform to the shape of the body. 



The arm openings are directed strongly upward. 



Locality and geological horizon, same as the last. 



Collection of Mr, G. K. Greene. 



DOLATOCRINUS ELEGANTULUS, N. Sp., (Rowley) 



Plate 44. Figs. 1^, H, 12. 



Body broader than high, hardly constricted below the arm bases. 



A distinct and continuous rim bounds the basal, funnel-shaped cavity. 

 The funnel as well as the stellate canal are large. 



The nodes at the center of the radial and interradial plates are rather 

 strong and the radial ridges are very pronounced. The nodes or tubercles on 

 the first radial plates are connected by rather strong transverse ridges, doubled 

 in two areas and giving a pentagonal outline to the basal region. From the 

 mid-interradial node there radiate outward toward the radial node^ from nine 

 to twelve toothed ridges with a few small elongate nodes between the ridges. 

 The center of the second interradial is occupied by a strong, elongate, cross 

 node. 



The plate sutures of the dorsal cup are grooved. 



The plates of the ventral disk are ornamented by small and larger tu- 

 bercular nodes. 



The anal tube is strong and" sub-central. The inter-ambulacral depressions 

 are rather strong. 



There are eighteen arm openings arranged thus : 4, 4, 3, 4, 3 and probably 

 two respiratory pores to the arm. 



The first radials are six sided and a little wider than long. The second ra- 



