J5J. CONTRIBUTION TO 



dials four sided and wider than long. The third radialis pentagonal and nearly 

 twice as wide as long. This latter plate supports on each upper sloping side a 

 second axillary plate each of whose upper edges supports a series of two plates 

 to the arm bases. 



The first interradial plate is the largest plate on the body and nine sided. 

 The second interradial plate is smaller and six sided. Above this latter plate 

 three smaller ones lying in the depression between the arm lobes. 



The plates of the vault can only be made out in part. 



The basal pentagon is a shallow depression. 



The locality and horizon, same as the last. 



The type belongs to Mr. G. K. Greene's collection. 



DOLATOCRINUS CORBULIFORMIS, N. Sp., (Rowley) 



Plate 44. Figs. 13, 14, 16. 



The centers of the plates are occupied by rather strong tubercles, connected 

 by short, sharp ridges. 



The center of the interradial plates is occupied by a tubercle from which 

 radiate toothed lines and lines of nodes. 



The base is flat bat hardly concave. 



In this species there is but one interradial plate on the dorsal cup. The 

 arm groups are strongly lobed and there are apparently eighteen arm openings, 

 4, 4, 3, 3, 4. 



The ventral side is somewhat injured, but the part preserved is orna- 

 mented by small spine-like tubercles, larger on the ambulacral ridges. 



The whole appearance of this pretty little crinoid is that of a low, orna- 

 mental basket. 



The first radial plates are hexagonal and wider than long. The second ra- 

 dial is quadrangular and wider than long. The third radial is pentagonal and 

 supports on each of its two upper sloping sides an axillary plate. Above each 

 of these second bifurcating plates are two rows of two plates each to the arm 

 bases. 



The first interradial plate is very large and seems to fill the entire interra- 

 dial area on the dorsal cup. 



Locality and horizon, the same as the last. 



Collection of Mr. G. K. Greene. 



