Fauna of the Morrow Group 
105 
surface, as indicated in the figures of this species represented 
by Beede on plate VI of vol. VI, Univ. Geol. Surv. of Kansas, 
which they resemble more closely than they do the figures of 
the type specimen.^o 
Horizon and locality. Brentwood limestone: near Fayette- 
ville, Arkansas (Stations 134 and 152) ; Sawney Hollow, Okla- 
homa (Station 210). Morrow formation: near Ft. Gibson, Okla- 
homa (Stations 296 and 301). 
Genus DELOCRINUS Miller & Gurley 
Delocrinus dubius n. sp. 
Plate III, figures 7-7b; text figure 2. 
Description. Dorsal cup below medium size, depressed bowl- 
shaped, base deeply concave, upper margin constricted, greatest 
Fig. 2. Diagram of dorsal cup of Delocrinus dubius. 
diameter about midway of the height; infrabasals situated at 
the bottom of the deep funnel formed by the concavity of the 
base, concealed by the column; basals five, pentagonal, the pos- 
terior basal longer than the others but not truncated above for 
the attachment of the anal plate, the lateral and anterior basals 
with length slightly greater than width, all strongly and regu- 
larly convex longitudinally and moderately concave transversely ; 
radials comparatively thick and massive, the two posterior ones 
hexagonal, the other three pentagonal in form, strongly convex 
