634 STUART WELLER 
an anal plate. The radial plates also as in C. turbinatus except that 
the two posterior ones are in contact laterally. The anal plate 
situated above the radials in a notch between the two posterior 
radials. 
Remarks.—This species differs from the other species of the 
genus here recognized, in‘having the anal plate crowded out beyond 
the radials, giving to the dorsal cup a radially symmetrical arrange- 
ment of the plates as in the genus Erisocrinus except that the number 
of basal plates is reduced to three. The elimination of the anal plate 
from the dorsal cup would ordinarily be considered as a good generic 
distinction, but in the present case there has been some hesitation 
in separating these specimens even specifically from C. turbinatus. 
In that species the anal plate is much reduced in size and the only 
distinction between it and the one here described is that in the present 
form the anal is still further reduced. The species is based upon three 
individuals, in two of which the sutures between the underbasals 
can be clearly recognized. 
EXPLANATION OF PLATE 
(The figures on this plate are reduced to about ¢ natural size) 
HYDREIONOCRINUS UDDENI N. sp. 
Fics. 1, 2.—Basal and lateral views of the type specimen; 3-5.—Three views 
of a spinous plate from the summit of the ventral sack, probably belonging to 
this species. (Pal. Coll. Walker Museum, No. 13363.) 
DELOCRINUS MAJOR N.. sp. 
Fics. 6, 7—Basal and postero-lateral views of the type specimen. (Pal. 
Coll. Walker Museum, No. 13364.) 
PHIALOCRINUS AMERICANUS N.. Sp. 
Fics. 8, 9.—Lateral and basal views of the type specimen. (Pal. Coll. 
Walker Museum, No. 13369.) 
ERISOCRINUS TRINODUS N. sp. 
Fics. 10, 11.—Lateral and basal views of the type specimen. (Pal. Coll. 
Walker Museum, No. 13368.) 
DELOCRINUS TEXANUS N. Sp. 
Fics. 12, 13.—Basal and postero-lateral views of the type specimen. (Pal. 
Coll. Walker Museum, No. 13365.) 
ERISOCRINUS PROPINQUUS N. sp. 
Fics. 14, 15.—Lateral and basal views of the type specimen. (Pal. Coll. 
Walker Museum, No. 13367.) 
