1881.] NATURAL SCIENCES OF PHILADELPHIA. 343 



has but two — the outer ones of the ray, and those between the 

 main divisions are placed a little farther apart, but are not 

 separated by any sinus. Each opening gives off a single arm, 

 which is short, and from the base up composed of two series of 

 plates. Near each arm opening, there is a conspicuous respira- 

 tory (?) pore, which like the arm opening is directed laterally. 



Interradials two to three, the first large ; anals one, three and 

 three. Vault lower by one-third to one-half than the calyx ; 

 apical dome plates somewhat prominent ; interradial spaces a little 

 depressed. Ventral tube perfectly central, extending far beyond 

 the tips of the arms. Column comparatively slender. 



This species agrees in every particular with B. Chrisfyi, except 

 it generall}' is smaller, and it has a single arm in place of two 

 from each arm opening. It also differs in the more depressed 

 form of the vault, and in being found only at the base of the 

 Upper Burlington limestone ; while B. Christyi struggles through 

 to the Burlington and Keokuk Transition beds. 



Locality and Position. — Base of Upper Burlington limest. Sub- 

 carb. Burlington, Iowa. 



This species is named in honor of Mr. James Love of Burling- 

 ton, an excellent collector, and an ardent lover of Crinoids. 



-Batocrinus WMlei Wachsm. and Spr., n. fp. 



Body small, globose, a little wider than high, height of calyx 

 and dome equal, both with convex sides ; the arm bases slightly 

 projecting. Surface of plates ornamented, the median line of all 

 radials up to the arm bases marked by a ridge ; other less dis- 

 tinct elevations diverge from the centre of the first interradial 

 plates, which continue to the radials, but without uniting with the 

 radial ridges. 



Base short, truncate, forming an elevated ring around the 

 column. First primary radial almost as large as second and third 

 together and considerably wider, the upper sloping sides com- 

 parativel}" long ; the second fully as high as the third and nearly 

 as wide. 



Secondary radials 2X10, the upper largest, with two shorter 

 pieces in the next order, making four arm openings in four of the 

 rays, the anterior ray has no tertiar}^ radials and only two open- 

 ings in all. Each arm opening supports a single arm, which, from 

 the second plate up, is constructed of two series of pieces alter- 

 nately arranged. Arms nearly round, of medium thickness and 



