253 Systematic Paleontology 



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. Near 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- 

 onal, each alternate joint provided with a node or short spine at the 

 margin." Wachsmuth and Springer, 1897. 



Two imperfect specimens from the Oriskany comprise all that the 

 writer has seen. The species is well marked and although the specimens 

 are imperfect they are readily recognized as belonging to this species. 

 Hall's type of this, as of all other species of this genus, was found near 

 Cumberland. 



Occurrence. — Oeiskany Formation, Eidgely Member. Cumberland. 



Collection. — U. S. National Museum. 



TeCHNOCRINUS (?) LEPIDUS n. sp. 



Plate XXXVII, Figs. 3-5 ; Plate XXXVIII, Fig. 1 ; Plate XXXIX 

 Description. — Specimen large ; calyx cup-shaped, depressed dorsally, 

 somewhat constricted at arm bases; plates generally highly convex, 

 smooth. Basals not discernible in specimens observed; costals 2, second 

 pentagonal and axial; distichals 2 x 10, the first usually hexagonal, the 

 second pentagonal, hexagonal or heptagonal and axillary; palmars 3 x 20, 

 of irregular shape, each second one bearing an arm ; intercostals 3, one in 

 the first series, hexagonal, situated above and between the radials and 

 between the first costals, two in the second series, situated between the 

 second and costals, and above and between the second costals and the 

 intervening intercostal of the first series ; interdistichals several (7-10), of 

 irregular size, shape and arrangement, all smaller than the corresponding 



