Mr. F. M‘Coy on some new Paleozoic Echinodermata. 249 
minent tubercles over the arm-bases and great plates on the 
vertex ; but it differs from those, besides the great size of the 
visceral portion, very obviously in the greater proportional length 
and less width of the costals, most remarkably of the second 
series. 
Rare in the carboniferous limestone of Bolland. 
(Col. University of Cambridge.) 
Eucalyptrocrinus polydactylus (M‘Coy). 
Sp. Char. (Small concave pelvis not seen) ; first-costals hexagonal, 
convex, one-third wider than long, each supporting a quadran- 
gular second costal, nearly twice as wide as long, its width nearly 
one-third less than that of the first costal ; on each second costal 
rests a pentagonal scapular joint, equalling the second costal 
in width but exceeding it in depth; on each scapula rest two 
hexagonal first arm-joints nearly equalling the scapulze in width 
and depth, and joining by their inner margins (so that the in- 
terbrachial plates cannot rest on the scapule) ; on each of these 
rests a smaller hexagonal second arm-joint, from each of which 
arise two hands of four or five fingers each; between the two 
second arm-joints of each arm is a small heptagonal inter- 
brachial plate, its inferior pointed end resting on the two first 
arm-joints, and its truncated upper end supporting the small 
lozenge-shaped plate peculiar to this genus ; circumscribed by 
the first and second costal, scapular, and first arm-plates, are 
the five large, equal, convex, nine-sided intercostal plates, each 
supporting on its upper edge a vertical row of three hexagonal 
interbrachial plates. Diameter of cup about 1+ inch. 
Besides the differences of proportion in the various plates 
which may be gathered from the description, this differs from 
the Hypanthocrinus (Eucalyptrocrinus) decorus (Phil.) and E. ro- 
saceus (Gold.) in the lateral union of the first arm-joints, and 
their supporting the interbrachial plates, instead of the scapule, 
the scapulze consequently being pointed above ; also in the plates 
resting on the intercostal not being bifid, and most remarkably 
from all of the genus in the number of fingers, there being but 
two to each hand in the other species. 
Rare in the Wenlock limestone of Dudley. 
(Col. A cast in the University collection at Cambridge.) 
BLASTOIDEA. 
Pentremites campanulatus (M‘Coy). 
Sp. Char. Bell-shaped, base as wide as the body ; pseudambu- 
lacra* wide above, tapering to the angles at the base ; trans- 
* I use the word pseudambulacra here to designate those poriferous rows 
in Pentremites, &c. which resemble ambulacra, but the pores of which are 
