U3. CONTRIBUTION TO 



DOLATOCRINUS WELLERI, N. Sp., (Rowley) 



Plate 41. Fig. 14 



The ornamentation of this species and its general appearance are much like 

 Stereoci'irms and from the fact that one of its radial rays has but two primary 

 radials, the kinship becomes closer. 



The basal funnel is bounded above by a strong rounded ridge or ring. The 

 basal flattenning extends out to the center of the second primary radials. - 



The first radials are hexagonal and of equal length and width. 



The second radials are quadrangular and wider than long. 



The third are pentagonal and a little wider than long. 



There are probably two plates above the bifurcation to the arm base. 



The first interradials are nine sided and large. There is apparently but 

 one^plate above the first interradial. 



The ornamentation of the dorsal cup is nodes and ridges. 



The radial ridges are broken but strong at the plate centers. 



The interradial plates have small central nodes with six or seyen broken 

 radiating ridges. P'rom the centers of the radial plates, short ridges or lines 

 of nodes pass out to the plate sutures. 



The ventral disk is unknown. The entire body was probably much com- 

 pressed, dorso-ventrically. 



There were probably twenty arms, as there appear to be four to the ray. 



The specific name is for Prof. Stuart Weller, of the Chicago University. 



Upper Devonian, Falls of the Ohio. 



Collection of Mr. G. K. Greene. 



DOLATOCRINUS CURRIEI, N. Sp., (Rowley) 



Plate 42. Figs. 1, 2, 3, 4, 5, 6. 



The width of the calyx is nearly twice the length. 



The basal plates form a deep funnel, nearly half the calyx depth. The 

 columnar canal is five lobed. There is no rim about the funnel. There is lit- 

 tle difference in the size of the three primary radials and the first secondary ra- 

 dial. All are broader than long. Higher radials smaller. 



The first interradial is large and eleven sided, supporting above a six sided 



