ECHINODERMA TA—CRINOIDEA . 565 



195. T. thiemei Hall. (Fig. 1903.) Mississippic. 



Crown short and stout. Basal spines present. 

 Burlington of Missouri and Iowa. 



Fig. 1903. Taxocrinus thiemei, 

 i- (After Meek and Worthen. ) 



Fig. 1904. a, Taxocrinus kelloggi ; b, c 

 T. communis. ( After Hall and Whitfield. ) 



196. T. kelloggi (Hall). (Fig. 1904, a.) Mississippic. 

 Arms twice bifurcating, each bifurcating plate being strongly 



nodose. Arm plates angular and granulose. 

 Waverly of Ohio. 



197. T. communis (Hall). (Fig. 1904, h, r.) Mississippic. 

 Like T. kelloggi in form and structure, but lacks the nodose 



bifurcating plates. 

 Waverly of Ohio. 



