17 



BATOCRINUS PARILIS, n. Sp. 



Plate II. Fig. 1. new of an entire specimen; Fig 2. az;igous 



view of the cali/x. 



Species medium size, very symmetrical, biturbinate. Calyx 

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

 (if the cc^lnmn. No i-adial 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, 

 thrre hiwagonul, two licptagoiuil. Second primary radials quad- 

 )"ingular, three times as wide as h>iig. Third jirimary radials 

 a little largoi- than the second, pentagonal, a.xillary and in the 

 lay on each sulc of the azygous area bear mi the distal sides 

 three secondai'y radials and (ui the proximal sides two second 

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

 upper side a single tertiary radial and vipon 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 tei-tiary i-adial, which gives to each of these rays 

 four ambulacral openings to the vault. In the ray opposite 

 the azygons area the thii-d )irimai-y radial supports on each 

 u]iper sloping side three secondary radials, which gives to this 

 ray two ambulacral openings to tlir \anlt. There are, there 

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

 The arms bifurcate on the first plate and hence there are 

 thii'ty-two arms in this species. The arms are composed of a 

 doubli' sciios of interlocking plates from the beginning and flat - 

 leu 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 l)v two smaller ones. There are six plates in the 

 a/.ygous ai'ea. The tirst one is in line with the first primaiy 

 i-adials and alxiiiT the same size. It is followed, in the second 

 range. l)y thieo hirge plates, subequal in size, and these are 

 followMJ in the third range by two small plates directly over 

 till' middle |)lal'' in t]ii' econd i-ant;('. 



