Crinotds, Blastoids <in<l Brachiopods. — Rowley. 305 
the under basals if such be present. Four of the l>;isals are 
probably pentagonal, extending - upward between the first ra- 
dials fully half the length of the latter and nearly meeting 
the large interradials above. The first radials and basals 
curve inward to form the basal concavity. The tii'th basal 
plate is apparently quadrangular, truncate above and entirely 
separating the first radials. First radials large, once and a 
third as wide as long, pentagonal. Second radials nearly three 
times as wide as long, less broad than the first radials, quad- 
rangular. Third radials a shade wider than the second radi- 
als, pentagonal, over twice as wide as long. Three plates in 
the second series, the third supporting two simple arms. The 
slightly sunken interradial areas and the rounded, convex 
character of the radials give a pentagonal look to the calyx. 
A large nine to ten sided plate with apparent minute plates, 
laterally placed, fills the four interradial areas, extending up- 
ward to the second plate of the second radial series. Azy- 
gous interradial filled by five irregularly arranged plates from 
four to six sided, the lowest and largest resting on the upper 
truncate side of the basal. A single, small, axillary plate 
resting between the short, sloping upper lateral sides of the 
first and second radial plates of the second series. The arms 
entire in the type, short, strong, twenty in number, simple and 
made up of from 18 to 20 heavy pieces. The arms give off 
from the inner side a few strong pinnies. Arms infolded or 
overlapping at top. Column moderately large, round, several 
joints being hidden in the basal concavity on a side view of 
the specimen. The whole fossil has a robust appearance and 
is one of the most beautiful crinoids yet discovered in our 
state. Hight of specimen from base to top of infolded arms, 
about one inch. Breadth quite as great. 
Found in the Hamilton beds of Callaway Co., Mo., by Mr. D. K. 
Greger, an intelligent and excellent collector. Type in the author's 
collection. 
This species seems to possess some characters at variance with Ta.ro- 
crinus and in some respects recalls the generic descriptions of both 
Gnotimocvinus (W. and Sp.) and Forbesiooinus (DeK. and L.). 
BiilocriiiUK slicpurdi (aov.sp.?). 
(Plate xiv, fig. ?>. Side view of the body, natural size.) 
Calyx deep cup-shaped. Each of the three basals is five 
sided, about twice as wide as long, flattened laterally and be- 
