• BATOCRINUS PARILIS, n. Sp. 



Plate 11, Fig. 1, view of an entire specimen; Fig. 2, azygous 



view of the calyx. 



Species medium size, very symmetrical, biturbinate. Calyx 

 obconoidal, about twice as wide as high, truncated only the size 

 of the column. No radial ridges! Surface smooth or very finely 

 granular. 



Basals form a low cup one-half wider than the diameter of 

 the column. First primary radials one-third wider than long, 

 three hexagonal, two heptagonal. Second primary radials quad- 

 rangular, three times as wide as long. Third primary radials 

 a little larger than the second, pentagonal, axillary and in the 

 ray on each side of the azygous area bear on the distal sides 

 three secondary radials and on the proximal sides two second 

 ary radials, the last of which are axillary and support on one 

 upper side a single tertiary radial and upon the other two ter- 

 tiary radials, which gives to each of these rays three ambula- 

 cral openings to the vault. In each of the lateral: rays the 

 third primary radial supports on each upper side two second- 

 * ary radials, the last being axillary and supporting on each 

 upper side a tertiary radial, which gives to each of these rays 

 four ambulacra! openings to the vault. In the ray opposite 

 the azygous area the third primary radial supports on each 

 upper sloping side three secondary radials, which gives to this 

 ray two ambulacral openings to the vault. There are, there- 

 fore, sixteen ambulacral openings to the vault in this species. 

 The arms bifurcate on the first plate and hence there are 

 thirty-two arms in this species. The arms are composed of a 

 double series of interlocking plates from the beginning and flat- 

 ten toward the superior ends and become longitudinally • con- 

 cave, as shown in the illustration. 



None of the interradials connect with the plates of the vault. 

 There are three plates in each regular interradial area, one large 

 followed by tw T o : smaller ones. There are six plates in the 

 azygous area. The first one is in line with the first primary 

 radials and about the same size. It is followed, in the second 

 range, by three large plates, subequal in size, and these are 

 followed in the third range by~two small plates directly over 

 the middle plate in the .eeond rang*', 



