* 
WHITE. J CARBONIFEROUS - FOSSILS. 129 
plates, and supported on a round column; arms long, siender, appar- 
ently simple above their origin on the last radials, and composed of 
small pieces, every third one of which bears, alternately on opposite 
sides, a long pinnule.” 
To this description may be added that of the following characteristics 
as observed in Mr. Meek’s type specimen, the only one yet discovered. 
Sides of the calyx nearly straight and continuous with the upper part 
of the column, which increases a little in size from below, to meet the 
full width of the base of the calyx; basal pieces comparatively large, 
extending upward from the first segment of the column to about one- 
third the height of the calyx; subradial pieces also comparatively 
large, being the largest of those which compose the calyx; first radial 
pieces smaller than the subradials, their height being less than one- 
thira the height of the calyx; first bifurcation of the right posterior 
arm, the only one known, upon the fourth radial piece; the anal series 
rather large and extending as far up, at least, as the fourth primary 
radial piece. ; 
Height of calyx, 6 millimeters; diameter at top, 5 millimeters; at 
base, 2 millimeters. The slender arms extend 30 to 35 millimeters above 
the calyx. 
Position and locality.—Mr. Meek reports this species from Carbonifer- 
ous strata of the mountain known as “ Old Baldy,” near Virginia City, 
Mont. 
Genus RHODOCRINUS Miller, 
RHODOCRINUS VESPERALIS White, 
Plate 35, figs. 4 a and b. 
Rhodocrinus vesperalis White, May, 1880, Proc. U. S. National Museum, vol. ii, p. 259. 
Body subglobose, the sides and outer portion of the base being con- 
vex; the base having a deep, sharply-defined, five-sided pit which con- 
tains the whole of the five basal pieces, and the sharply inflexed inner 
ends of the five subradial pieces; the latter pieces moderately large, but 
not much larger than some of the radials and interradials; first radials 
varying in size in the different rays, the larger ones nearly or quite as 
large as the subradials; second radials much smaller than the first, and 
the third radials still much smaller than the second, the difference in size 
being more in their vertical than in their transverse diameter; the third 
radial, which is very narrow vertically, supports two brachial pieces, and 
they in turn support each another brachial piece, beyond which the 
structure is unknown; interradial pieces up to a line with the bases of 
the arms, three for four of the interradial spaces, and four for that of the 
anal side; the first or lower interradials are of about the same size as 
the first radials, but the two upper ones are somewhat smaller; vault 
moderately convex, prominent opposite the arms, and somewhat de- 
pressed between them, composed of numerous rather small pieces; pro- 
boscis subcentral, its length unknown. All the pieces of the body, ex- 
cept those of the base, are slightly tumid, their surfaces being rugose, 
or wrinkled, and in some cases marked by obscure lines which radiate 
from the center of each piece in groups of threes and become continu- 
ous with similar lines on adjoining pieces. 
_ Height from the base of the body to the base of its proboscis, 12 mil- 
limeters; breadth of the same, 16 millimeters. 
Although this species serve@as a very suggestive link between the 
crinoidal faune of the Upper Coalmeasures and the Subcarboniferous, 
9 
