PLATE XXXVI. 



Illustrating paper by Stuart Weller, entitled "Description of a new Species 

 of Hydreionovrinus from the Coal Measures of Kansas." pp. 372-374. 



Fig. 1. Lateral view of the type specimen, of HydrHnnocrinus kansasensis 

 showing the calyx, the right posterior arm and the scattered plates of the 

 crushed ventral sack with its crown of spinose plates. (Natural size.) 



Fig. 2. Basal view of the dorsal cup. (Natural size. ) 



Fig. 3. Vertical view of the crown of spatulate spinose plates at the sum- 

 mit of the ventral sack. ( Natural size. ) 



Fig. 4. Diagram showing the arrangement and proportions of the plates 

 of the dorsal cup. IB^ Infrabasals. B=Basals. R=Radials. Br. = 

 First Brachials. R.V^ Kadianal. X ^Sptcialaual. T = First tube plate. 



