Agelacrinidae and Lepadocystinae 
441 
shorter and broader, and terminate abruptly in acute points, 
when viewed from above. On the anterior and left anterior 
rays, there are about twelve or thirteen pairs of lateral covering 
plates; on the right posterior ray there are about eleven pairs; 
on the two remaining rays, there are about ten pairs. 
The papillae of the Dermatostroma number about six or seven 
in the length of 1 mm. in the interambulacral areas, and four or 
five in the same length at some points along the margin. 
The animal probably was capable of shifting its position from 
place to place, and, in consequence, the Dermatostroma did not 
extend from the theca of the Agelacrinus over on to the shell of the 
Rafinesguina. 
The small curvature of the rays is a primitive character. This 
character should be sufficient to distinguish Agelacrinus vetustus 
from d.. pileus, in which the distal end of the rays turns sufficiently 
to become parallel to the peripheral band for a short distance. 
An even more primitive condition is shown by the Trenton Agela- 
crinus hilling si, Chapman, in which the rays are sharp and quite 
straight, the distal end abutting against the peripheral ring. 
Agelacrinus pileus is listed by Nickles from the Corryville 
member of the Maysville but I have seen specimens on the same 
slab with Plectorthis plicatella, thus suggesting an earlier age for 
some of the specimens. 
Agelacrinus vetustus is merely another example of the rather 
numerous cases in which typical Maysville species are represented 
in the Cynthiana formation by closely similar forms. 
32. Agelacrinus faberi, Miller 
{Plate /, Figs. S A, B, C; Plate III, Fig. 4) 
(Journal, Cincinnati Society of Natural History, vol. XVII, p. 156, Plate 8, 
Figs. 24, 25, 1894) 
This species was found by C. L. Faber ^Tn the extreme upper 
part of the Hudson River (Cincinnati) Group, about half way be- 
between Osgood and Versailles, Indiana.” The type, at present, 
forms No. 8821 in Walker Museum, at Chicago University. It 
probably belongs to the Whitewater division of the Richmond, 
immediately above the typical Saluda, 
The type is too poorly preserved to merit description. It 
undoubtedly would not have been described had it not been for 
