seen at the end and the small, round visceral cavity. The 

 third circle or radial plates are destroyed in our specimen, but 

 the facets for attachment are preserved and there is no reason- 

 able doubt but that there are six of them. 



Found by Mrs. J. M. Milligan, in the Niagara Group, in De- 

 catur county, Tennessee, and now in her collection. 



Family UNCERTAIN. 



indianocrinus, n. gen. 



[Ety. proper name, Indiana; Krimon, lily.] 



This genus is founded upon the calyx of a single specimen 

 and hence there are only a few characters to be ascribed to it. 

 Basals, five. No subradials. Primary radials one by four 

 Arms four. No regular interradials. Azygous interradial rests 

 between the upper sloping sides of two basals and is followed 

 by two plates at the top of the calyx. Plates punctate. Type 

 /. punctata?. This genus cannot be certainly classed in any 

 family. 



INDIANOCRINUS PUNCTATUS, n. Sp. 



Plate V, Fig. 8, basal view; Fig. 9, summit view; Fig. 10, lateral 

 view, azygous side on the right; Figs. 11, 12 and 13, 

 same views magnified two diameters. 



Calyx pear-shaped; plates longitudinally convex; sutures de- 

 pressed. Surface pitted or punctate. Column very small. 



Basals pentagonal, elongated, truncated for a very small 

 column and forming together a pentagonal cup, with depressed 

 longitudinal sutures, about one-third of the height of the calyx. 

 Primary radials longer than wide, the two adjoining the azy- 

 gous area larger than the other two, most convex in the mid- 

 dle, at the lower edge of the articulating facets; lateral sutures 

 deeply depressed toward the top of the calyx. Facets for the 

 second radials a little more than one- third of the width of the 

 plates, subelliptical in outline and deeply notched for the am- 

 bulacral canals. The angles formed, at the sutures on the 

 superior face, between the articulating facets, are obtuse, as 

 the superior lateral angles of the first radials curve over 

 toward the vault. 



