INDIANA PAL.CONTOLOGY. t34. 



DOL AT OCR IN US FUNGIFERUS, N. Sp. (Rowley) 



Plate 39. Figs. 1, 2, 3. 



The body of this crinoid is depressed, being nearly twice as wide as long. 

 The basal plates occupy the sides and bottom of a funnel, with a bounding 

 ■circular rim above. 



The columnar canal is pentalobate where it pierces the bottom of the 

 funnel. 



The first and second radials form a flattened zone, the former being hexago- 

 nal and broader than long; the latter, quadrangular and nearly. twice as wide 

 as long. 



The third radials are pentagonal and wider than long. 



The first plates of the second radial series are axillary and support on each 

 upper sloping side a series of about three plates. 



The first interradial is apparently nine sided and the largest plate in the 

 body. 



Above this, there is one more plate in the anal interradius of the dorsal side. 



There is rather a strong node in the center of each dorsal plate and those 

 of the radial series are connected by a ridge. From these nodes radiate in all 

 directions nodular lines, fully twenty of which arise from the first interradial 

 tubercle.- 



There are nineteen arm bases, one ray having but three. 



The ventral side is ornamented by very small granular prominences and 

 large mushroom-shaped tubercles, unlike the ornamentation of any other species 

 •of Dolatocrinus with which we are acquainted. 



There are two respiratory pores to each arm base. 



The anal opening is moderately large and slightly excentric. 



This elegant crinoid is from the Middle Devonian, Falls of the Ohio, and 

 the type is the property of Mr. G. K. Greene. Compare with J), greenei^ 

 M. (fe G. 



DOLATOCRINUS EX C A V A T US . AV. ,?t S.. Rowlev. 



Plate 39 Fia. 4. 



The specimen, only a part of the dorsal cu}). is most beautifully pre- 

 served. 



The basal funnel is quite deep and the radial ridges, although quite sharp 

 are prominent only on the first radial plates, decreasing upward and reaching 

 the arm bases as mere lines. 



