Y 
er 
290 THE CRINOIDEA CAMERATA OF NORTH AMERICA. 
Eretmocrinus remibrachiatus, var. expansus W. and Sp. (nov. var.). 
Plate XXXVI. fig.1; Plate XX XVII. Figs. 1a, b, and Plate XLIV. Fig. 9. 
Batocrinus (Evretmocrinus) remibrachiatus (an part) — Muzx and WortHeEn; Geol. Rep. Illinois, Vol. V., 
p- 870, Plate 10, Fig. 5. 
Evretmocrinus ramulosus (in part) — W. and Sp. ; 1878, Proceed. Acad. Nat. Sci. Phila., p. 236, and 1881, 
Revision Paleocr., Part II., p. 173. 
Syn. Evetmocrinus cassedayanus Mittur and GuruEy, 1894; Illinois Geol. Surv., Bull. 3, p. 17, 
Plate 3, Fig. 1. 
Larger than the typical form; the ventral disk more bulging and com- 
paratively higher; the plates more tumid; the anal tube shorter and more 
slender; the costals proportionally larger, the second frequently hexagonal 
or heptagonal owing to the comparatively small size of the first interbrachial. 
The palmars of the two posterior rays in the subdivision next to the anal 
interradius consist of but one plate, which is axillary and supports two post- 
palmars, thus giving to those rays five arms in place of four. The arms at 
their widest parts sometimes reach a width of from 18 to 20 mm.; they are 
in the majority of specimens spread out horizontally to one half their length, | 
when they curve abruptly upward and inward, and fold back in a straight 
line to the calyx, forming a flat, circular disk, in which the serrated edges of 
the arms frequently interlock with those of adjoining arms. 
Horizon and Locality. — Burlington and Keokuk Transition bed; near 
Burlington, lowa, and Henderson Co., Ills. 
Types in the collection of Wachsmuth and Springer. 
Eretmocrinus granuliferus W. and Sp. (nov. spec.). 
Plate XXXIV. Figs. 5a, b, ¢. 
This species has its closest affinities with £. remebrachiatus, from which, 
as well as from all other species of this genus, it differs in its unique orna- 
mentation. While in that species the plates are flat and perfectly smooth, 
they are here slightly convex, and the whole dorsal cup is covered by irregu- 
lar but distinct granules or small nodes, densely crowding the surface. There 
are no ridges or striz either on the radial or interradial plates. Dorsal cup | 
wider than high, rapidly spreading from the top of the basals to the arm 
recions. 
) Base broadly truncated, expanding laterally into a broad trilobate rim, 
y flat at the bottom except in the middle, which to one third the width of the 
