14 



BATOCRINUS INSUETUS, 11. Sp. 



Plate T, Fig. 8, azygous view of calyx, vauU, proboscis and part 

 of the arms; Fig. 9, side view of same specimen. 



Species rather below medium size. Calyx obconoidal, trun- 

 cated below, about twice as wide as high; surface smooth or 

 finely granular. Column medium size. 



Basals form an hexagonal disc one half wider than the diame- 

 ter of the column, with a central depression and rim around 

 it, for the attachment of the column. First primary radials 

 wider than high. Second primary radials quadrangular, short, 

 two or more times as wide as high. Third primary radials a 

 little larger than the second, twice as wide as high, pentagonal, 

 axillary, and support on the upper sloping sides the secondary 

 radials. In each lateral ray, the third primary radial supports, 

 upon each upper sloping side, two secondary radials, the last 

 of which is axillary and supports upon each upper sloping side 

 a tertiary radial, that bears a single arm. There are, there- 

 fore, four arms in each of these rays. The distal side of each 

 third primary radial adjoining the azygous area supports three 

 secondary radials that bear a single arm; the proximal side of 

 each supports two secondary radials, the last of which is axil- 

 lary and supports upon each side a tertiary radial that bears 

 a single arm. There are, therefore, three arms to each of 

 these rays. In the ray opposite the azygous area, the third 

 primary supports upon each upper sloping side three second- 

 ary radials, the last of which supports a single arm. There 

 are, therefore, sixteen simple arms in this species and sixteen 

 ambulacral openings to the vault. The arms are rather small 

 and composed of a double series of interlocking plates that are 

 slightly deeper than wide, in the lower part, but the arms 

 flatten out near the superior ends, as they do in many other 

 species in this genus. Pinnules long and dense. 



There are three regular interradials in each area, one large, 

 the other two small. There are four azygous interradials, one 

 heptagonal, in line with the first primary radials and slightly 

 larger and longer than either of them. It is followed by three 

 plates, the middle one being the larger and longer, but it is 

 cut off from the vault by the tertiary radials. The vault is 

 highly convex, with a large proboscis that terminates in a 



