CALYPTOCRINID&. 355 
Remarks. — Callicrmus is probably the forerunner of Eucalyptocrinus ; it 
is built on the same plan, but its family characters were not, as yet, so highly 
differentiated as in that genus. 
Callicrinus Beachleri W. and Sr. 
Plate LXXXIII. Figs. 14a, b. 
1892. W. and Sp.; Amer. Geologist, Vol. X. Sept., p. 140. 
The calyx has the usual form of the genus. Its height to the base of the 
tube one fourth greater than the width at the top of the dorsal cup; the 
height of the cup 11mm., that of the ventral disk 16 mm., and the length of 
the partition walls 8mm. Dorsal cup broadly truncated at the base; the 
sides almost straight, gradually expanding upwards. The radials and costals 
at the surface sharply keel-shaped, especially the former, and the angularity 
continued upon the distichals, but without attaining the prominence that it 
has at the lower plates; the first interbrachials slightly convex, with a small 
tubercle in the centre. 
Basals small and nearly of the same size, forming a concavity which is 
rather small and shallow for the genus. Radials near the upper end fully as 
wide as long, and twice as wide as at the lower part, which curves gently 
inward to meet the basals. First costals twice as wide as long; the second, 
which are longer and wider, rarely truncated by the interdistichal. First 
distichals twice as large as the second, and but little smaller than the upper 
costals. The palmars small and pentangular. First interbrachials longer 
than wide, a little smaller than the radials; the two above together nearly 
twice as wide as the first, their upper ends rising to the height of the 
second or third arm plates. Interdistichals but little smaller than the upper 
interbrachials, and projecting upward in a similar manner. Ventral disk 
conical, its sides convex. The ten plates which rest upon the interbrachials 
and interdistichals, respectively, and form the compartments for the recep- 
tion of a pair of arms, are twice as high as the ten intervening ones, which 
rest against the sloping upper faces of the palmars. There are in all twenty 
partitions around the disk, and each arm occupies a separate compartment. 
The partition walls are moderately thick, and slightly grooved along their 
outer faces. The ten larger ones rise to a level with the upper end of the 
first ring of plates in the disk, of which they form wing-like extensions ; 
they are sabre-shaped and pointed at the ends, The second ring of the disk 
