122 SMITHSONIAN INSTITUTION 



PLATE LVIII 

 (All figures natural size) 



PAGE 



Figs. 1-8. Taxocrinus praestans n. sp 404 



Figs. 1,2. Two mature crowns, more or less flattened, with enlarged proximal part of stem 

 attached; anterior and left lateral views. Shows the 4 IIBr; profuse development of 

 iBr plates and their characteristic arrangement, with crescentic distal margin ; the 

 tongue-like salient angles of BB ; and the stem without any sudden contraction. 



Indian Creek, Indiana. 



3. Posterior view of similar specimen, with most of anal series broken away; tube evidently 



merged in strong perisome. Same locality. 



4. A very large, much flattened specimen, with BB more angular; from equivalent beds 



at Canton, Washington County, Indiana. 



5.6,7. A series of young specimens, all flattened, with two, one, or no iBr plates; found 

 associated with those of figures i, 2, 3. Fig. 5 has two iBr in r. post, interradius 

 concealed by crushing; fig. 6, has three iBr in some areas. Indian Creek, Indiana. 



8a, b. Anterior and posterior views of a young specimen from the same beds and locality, 

 with stem slightly constricted, and an extra bifurcation in r. post. ray. Perhaps 

 T. colletti. Indian Creek, Indiana. 



Keokuk Gr. ; Lower Carboniferous. Indiana. 



All specimens in the author's collection. 



