146 The American Geologist. March, i89o 
BATOCRINUS CALVINI. 
Description of a New Species of Burlington Crinoid. 
By R. R. Rowr.EY, Currj'ville, Mo. 
BaTOCKINUS CALVINI. n. sp. 
Body depressed, nearly twice as broad as deep ; calyx saucer 
shape ; plates rather thick and those in the calyx smooth and 
without any apparent convexity, while those in the vault are 
tuberculate ; basal plates elongate and without a rim, being 
merely excavated for the reception of the column. Excava- 
tion indicates a comparatively small round column; colum- 
nar perforation but little larger than a needle point. 
The long upper side of the basals support the first radial 
plates which are hexagonal, and once and a half as wide as 
deep. Second radials small, twice as broad as long, quadran- 
gular. Third radials, or primary bifurcating plates, penta- 
gonal, twice as wide as long and but little larger than the 
second radials, supporting on their upper sloping sides a 
quadrangular piece on the right and a pentagonal plate on 
the left. Each of these latter pieces supports a large second- 
ary bifurcating plate, over three times as wide as long and 
the largest piece in the ray except the first radial. The sec- 
ondary bifurcating plates support on the left, above, a penta- 
gonal and on the right a hexagonal piece, each of which, in 
turn, supports an arm-bearing plate. 
First interradials large, width and depth about equal, hep- 
tagonal and nearly as large as the first radials. Above the 
first interradial is a much smaller hexagonal piece, about as 
long as wide. A minute plate lies to the right of the line of 
division between these interradials. 
The first plate of the anal series is quite as large as the first 
radials and, like them, is hexagonal and rests on the upper 
side of a basal. A second hexagonal piece, two-thirds as 
large as the first, rests upon the upper side of the latter. 
Width and depth about equal as in the first anal plate. Above 
the second anal piece is a long third piece, heptagonal in out- 
line and nearly twice as long as wide. Four other plates o^ 
the anal area rest on the upper and lower lateral edges of the 
