448 
Aug. F. Foerste 
more irregular. At their margins the scales are closely appressed, 
the proximal parts of each scale overlapping the distal outlines of 
the next scale, in a direction toward the central part of the theca, 
although the amount of overlap is small. Strictly defined, the 
interambulacral plates are imbricating, and not mosaic, at contact. 
Only the lower part of the anal region is preserved in the speci- 
men. Several of the triangular plates of the anal pyramid are 
present. The adjoining plates are small, forming a very narrow 
band on the lower left side of the pyramid, widening on the lower 
right side toward the termination of the right posterior ray. This 
part is well figured by Clarke, in his paper on New AgelacriniteSy 
in Bulletin 49, New York State Museum, p. 189, Fig. 2, 1901, 
Preprinted as Fig. Ic on plate VI of this Bulletin) illustrating 
specimen No. 40744, in the United States National Museum, 
which is labelled as coming from Morrow, Ohio. This probably 
was the locality from which the type of the species was obtained, 
the collector. Professor Holbrook, having lived at Lebanon, Ohio. 
Morrow was the type locality also of Agelacrinus warrenensis. 
It was a well known collecting ground. 
The marginal parts of the type specimen, as here identified, 
below the distal parts of the ambulacral rays, consist of two series 
of plates, grading into each other. Those immediately below the 
rays are of small vertical height but of considerable lateral extent. 
They are arranged in three or four rows, the plates becoming suc- 
cessively smaller, and grading into about three rows of much 
smaller plates, resembling in form the overlapping scales of an 
acorn cup. 
Agelacrinus holbrooki is listed by Nickles from the Corryville 
division of the Maysville. 
35. Agelacrinus warrenensis, James 
{Plate I, Figs. 4 A, B) 
{Paleontologist, No. 7, p. 58, Plate II, Figs. 3, 3a, 1883) 
The following is the description presented by James: 
Body circular, varying in diameter from J inch to J inch or more. 
Attached to the convex valves of Strophomena (known at present as 
Rafinesquina) , and, probably, other foreign substances; the under side 
concave, or otherwise, conforming to the surface grown upon. Disc 
composed of squamiform plates, overlapping inward from the periphery; 
