244 Mr. F. M‘Coy on some new Paleozoic Echinodermata. 
XXVIII.—On some new Paleozoic Echinodermata. 
By Freperick M‘Coy, M.G.S. & N.H.S.D. &e. 
CrinoipEa. (Articulata.) 
Cupressocrinus (Gold.). 
Ir will be observed in the following descriptions of two species 
of this genus hitherto only known in the foreign Devonian strata, 
that I have attributed interscapular plates to its cup as in Pofe- 
riocrinus, although such are not indicated in the figures or ge- 
neric characters of Goldfuss. I have however detected them in 
an authentic specimen of his C. crassus from the Eifel m the 
Cambridge collection, although not so clearly as in the followmg 
species. In the number and position of the plates of the body, 
Cupressocrinus and Poteriocrinus are identical; and in both, 
the articulations for the arms extend the entire width of the 
upper edge of each of the scapule; but there is a striking dif- 
ference in their form, which seems dependent on the total dis- 
similarity of their arms ; the cup in the latter genus is elongate- 
conic, the comparatively narrow scapule giving off arms of mo- 
derate width, dichotomizing frequently, while in Cupressoerinus 
the cup is of an extremely wide saucer-like form, and the seapule 
of inordinate width to give origin to the curiously wide, massive, 
simple arms which render the genus so remarkable. 
Cupressocrinus calyx (M‘Coy). 
Sp. Char. Cup very wide, evenly convex, saucer-shaped, three 
times wider than long; pelvis small, slightly concave, penta- 
gonal, of five pentagonal pieces; alternating with and above 
which are five large first-costals, their length and width equal 
to the diameter of pelvis, four pentagonal and one with a very 
short sixth side; alternating with, and above those, are five 
pentagonal scapule, as long as the costals, but the width 
double the length ; to the short side of the hexagonal costal is 
obliquely attached a long pentagonal intercostal supporting 
two very small interscapular plates; scapule very thick, 
articular surface flat with an articular ridge running its whole 
width ; all the plates slightly convex and eaneeh Width of 
cup 9 lines. 
Rare in the carboniferous limestone of Derbyshire. 
(Col. University of Cambridge.) 
Cupressocrinus impressus (M‘Coy). 
Sp. Char. Cup four times wider than deep; pelvis concealed in 
a deep circular pit, out of which spring the broad ends of five 
ovato-lanceolate first-costals, the apex of one of which is trun- 
