Official Oriraii of tlie Kansas Cily Academy of ^eielK'e. 
VOL. V. 
KANSAS (;1TY, MO. AUGaST. 1891. 
NO. 8 
Proceed ii 
;BKariPa!^ Citv Academy of ScieiirL-, 
July 1891. 
Description of some new 
Specie^" of Crinoids and Blastoids from 
the Sub-carl)oniferous Rocks of 
Pike and Marion Counties, Mo., 
and Scott County, Ya. 
By R. R. Rowley and Sid. J. Hare 
The material from which ihe following 
descriptions have been made, was collected 
from the Burlington, Keokuk and Kaskaskia 
Limestones and, with but one exception, by 
Mr. R. R. Rowley in whose collection all 
the types are. save the figured sptcimen of 
J5(i! tocv inus da v is i. 
b\ strong depressions and so protruberant at 
the aitijulating facets for the second radials 
as to give a rather strong fivedobed appear- 
ance in a basal view of the calyx. 
Articulating facets more than twc-thirds 
the width of the first radials; concave and 
Init little broader than long. 
In two of the interradial areas three small 
plates, each, are observed, the central one 
pentagonal, longer than wide, while the 
lateral two are somewhat larger and ap- 
parently heptngonal. Surface of all plates 
finely granulated. 
Two specimens collected from the base 
of the Lower Burlington Limestone at Louis- 
iana, Mo., are the types of this species. 
Platycrinus rrsuM, n. sp. 
Platycrinus corbuliformis, n. sp. 
Plate III Fig. 3, side view of the body 
enlarged to two diameters. 
Plate in. Figs. 1 and 2, side and basal 
views of the cahj.c. Natural size. 
Calyx, basket-shaped. Basais broadly hol- 
lowed about the columnar attachment and 
swolen laterally into a rounded, ring like 
projection. The sutures of the basal plates 
marked by deep depressions. First radial 
plates a little broader than long, separated 
Body, spherical. Calyx, cup shaped. Basal 
plates flattened, with a slight elevation to 
which the column is attached. All the calyx 
sutures beveled. First radials about as long 
as wide, protuberant at the facets which lat- 
ter are about one-half the width of the 
radials, slightly concave and but little broad- 
er than long. Interradial areas depressed. 
A strong lateral wart in the anal area 
