CALYPTOCRINID 2. 
[S) 
OO 
eo} 
Eucalyptocrinus Elrodi S. A, Mittrr. 
(Revised W. and Sp.). 
Plate LXXXI. Figs. 7a, b, 8, 9, 10, 11, 12, 13. 
1891. S. A. Minter; Ad. Sheets 17th Rep. Geol. Surv. Indiana, p. 40, Plate 7, Figs. 9, 10. 
Syn. Eucalyptocrinus celatus Hatt, 1865 (not 1843) ; Trans. Alb. Inst., p. 226 (Abstr., p. 32) ; 
and (?) 20th Rep. N. Y. State Cab. Nat. Hist., p. 321 (revised edition, p. 363), and 28th Rep., 
p. 142, Plate 16, Figs. 1-10, and Plate 19, Figs. 1-3; also 11th Ann. Geol. Rep. Indiana, p. 274, 
Plate 16, Figs. 1-10, and Plate 19, Figs. 1-3. 
Syn. Eucalyptocrinus subglobosus S. A. MituEr, 1891, Adv. Sheets 17th Rep. Geol. Surv. Ind., p. 37, 
Plate 7, Fig. 3. 
Usually a little larger than Z. celatus, shorter in proportion, and not 
attenuate at the poles. General form from subglobose to ovate, the base 
moderately excavated for the reception of the column. Dorsal cup a little 
shorter than the height of the partition walls enclosing the arms. The 
plates of the dorsal cup, as well as the arms, and also the outer edges of the 
partition walls, marked by numerous round or elongate nodes, often two or 
three of them confluent and forming straight or vermicular ridges trans- 
versely or longitudinally arranged. The nodes upon the arms are in longi- 
tudinal rows, there being generally two rows in the upper part of the arms, 
and four at the lower end. 
Basal concavity small and shallow for the genus, the plates completely 
hidden by the column, forming a short cone at the inner floor. Radials mod- 
erately large, the lower ends curving abruptly mward, the remaining parts 
outward and slightly upward, the lateral faces rapidly tapering, the sloping 
upper faces short, and the upper face concave. First costals wider than long, 
the sides convex ; the second hexagonal, the upper angle truncated by the 
interdistichals. First distichals once and a half as large as the second, and 
the latter more than twice as large as the fixed palmars, which are subtri- 
gonal. First interbrachial very large, the middle part almost as wide as long, 
the upper end broadly truncated by the interbrachials of the second row: 
The two latter plates together are longer than wide, having the greatest 
width at one third their height, whence they gradually slant to the top, 
which is truncate. The interdistichals are of a similar form, but one third 
smaller than the two upper interbrachials, and rise, like them, considerably 
above the level of the arm bases, each supporting also a partition. The 
outer faces of the partitions are fully twice as wide at the lower end as at the 
upper, and are slightly grooved. Arms gradually tapering upwards, quite 
