PERMIAN CRINOID FAUNA FROM TEXAS 633 
beneath the postero-lateral basals being anchylosed. In the second 
example mentioned above, these sutures seem to be beneath the 
posterior and the two postero-lateral basals, so that there are two 
small plates and one large one formed by the union of the three 
anterior original underbasals. This is believed to be an abnormal 
condition in this one individual, since among five examples of the 
genus in which these sutures between the underbasals can be detected, 
all except this one have the normal arrangement. 
CIBOLOCRINUS TEXANUS N. Sp. 
(Plate I, Figs. 18, 19) 
Description.—Dorsal cup turbinate, the sides diverging with a 
gently concave curvature from the margin of the colmnar facet, 
becoming slightly convex toward the distal border of the cup. Sur- 
face of the plates smooth, the sutures not impressed in grooves. 
The dimensions of a dorsal cup are: diameter 21™™, height 14™™. 
Underbasal plates three in number, large, about one-half their length 
occupied by the large columnar facet which is in the form of a conical 
depression in the. base of the cup, the distal portions of the plates 
diverge upward and form the sides of the shallow cup. Basal and 
radial plates large, similar in form and size to those of C. turbinatus. 
Anal plate small, similar to that in C. turbinatus. 
Remarks.—This species is closely allied to C. turbinatus, hut may 
be distinguished from that species by its much larger columnar 
facet, and by the concave curvature of the sides of the dorsal cup. 
CIBOLOCRINUS SYMMETRICUS N. sp. 
(Plate I, Figs. 27-30) 
Description—Dorsal cup turbinate, the sides diverging from the 
margin of the columnar facet to the distal margins of the radials, 
the surface of the plates smooth and having the regular curvature 
of the surface of the cup or sometimes a little convex, the sutures not 
impressed in furrows. ‘The dimensions of the most complete example 
ate. diameten of dorsale.cup 16%™ heightvot same 132") Ihe 
underbasal plates as in C. turbinatus. The basal plates also as in 
that species except that the posterior one is angular at its distal 
extremity like the others, not being truncated for the reception of 
