6 A CONTUIBUTION TO THE LoWER DeVOXIAX FaUNAS OF MARYLAND 



free plates, and these by two rows of subquadrangular pieces, united by a 

 sharply zigzag suture. Arms four to the ray, strong, fiat, and of almost 

 uniform width throughout. Pinnules contiguous. Interbrachials four 

 or five : 1, 2, 1, 1, all comparatively large. Column round, large, tapering; 

 the joints rather long and slightly rounded exteriorly." ^Yachsmuth and 

 Springer, 1897. 



The writer has seen only the exterior mould of the lower part of the 

 calyx of an individual of this species. It is larger than Hall's type, but 

 the plates that can be made out indicate that it belongs to this species. 

 The type came from Cumberland. 



Occurrence. — Oriskany Formation, Eidgely Member. Cumberland 

 (fide Hall), Hancock. 



Collection. — Marjdand Geological Survey. 



Technocrinus spinulosus (Hall) 

 Plate XXXYII, Pigs. 1, 2 



Mariacrinus (Technocrinus) spinulosus Hall, 1859, Pal. N. Y., vol. iii, p. 140, 



pi. Ixxxv, figs. 1-18, 1861. 

 Technocrinus spinulosus Wachsmuth and Springer, 1897, Mem. Mus. Compt. 



Zool., No. 20, p. 305, pi. xxli, fig. 3. 



Description. — " Calyx subglobose, the arm bases slightly contracting. 

 Plates of the dorsal cup marked by a central spine or node, surrounded 

 by smaller nodes, which vary in number among the plates. From the 

 nodes two to four parallel ridges pass out to the sides, and these are con- 

 tinued upon adjoining plates. Xear the arm bases the ridges gradually 

 disappear, and the plates are marked only by a central spine. 



" Basals four, of medium size, forming a shallow basin with five sets of 

 four ridges, each set communicating with those upon the radials. Eadials 

 and costals nearly as wide as long, decreasing in size upwards; the second 

 costal but half the size of the first. Distichals one to each side of the 

 costal axillaries. The first palmar enclosed in the calyx. Arms twenty, 

 stout, rounded ; composed at their bases of cuneate pieces, which interlock 

 farther up, and gradually become biserial. Interbrachials apparently 

 four. All other parts of the calyx unknown. Column slightly pentag- 



