VIII. Cyathocrinus. 221 
Cyathocrinus vallatus, sp. n. 
(Pl. XILI. figs. 14-18.) 
This species is based on three specimens, viz. :— 
In the British Museum : 
(a) E 6005, a somewhat worn cup in matrix. Gray collec- 
won. (Pl Xs ne, 1s.) 
(6) E 6006, a cup still more worn, especially in the distal 
region, and ground down at the sides; in matrix ; 
seen from the right side. Gray collection. 
(Pl. XIE. fig. 15.) 
In the Museum of Mason College, Birmingham : 
(c) 170, a better preserved cup, showing articular facets for 
stem and arms; in matrix. (Pl. XIII. figs. 14, 
16,, 17.) 
These specimens all come from the Wenlock Limestone of 
Dudley, but the exact horizons and localities are uncertain. 
They are all in a rather yellowish shale, on the top of a 
limestone; it is therefore probable that they come from the 
Upper Wenlock Limestone. 
For permission to figure the specimens in the British 
Museum | am indebted to Dr. Henry Woodward, F.R.S. ; 
while for the loan of specimen ¢ Prof. C. Lapworth deserves 
my best thanks. 
The trivial name vallatus, which means encircled by a 
ridge, veters to the characteristic ornament of the cup-plates. 
SPECIFIC DIAGNOSIS. 
Dorsal cup rather elongate, with convexly rounded sides ; 
plates plane, with a strong concentric ridge at a short distance 
from the suture, and with irregular concentric or slightly 
radiating ornament on the inner part. Axial canal not sepa- 
rate. Stem with a large quinquelobate lumen. Arms, 
ventral sac, tegmen, and stem unknown. 
REMARKS ON THE SPECIES. 
Dorsal Cup has a somewhat ovoid curve, bulging more in 
the region of the basals. ‘he measurements of the speci- 
mens are as follows :— 
Ann. & Mag. N. Hist. Ser. 6. Vol. ix. 16 
