4J2 rilOF. F.J. BKLL ON TUfc; TKMNOl'LEUKIU.E. [JuUC 



(Plate XLI.) 



For the purposes of present convenience I adopt tlie name Tern- 

 nopleurida^ for tlioi-e forms wliicli are urou))C(l under it by Prof. 

 Alex. Agassiz in his * llcvisiou of the Echini.' I need not now de- 

 [2J 



