CALYPTOCRINID^. 339 



EucalyptOCrinUS Elrodi S. A. Miller. 



(Eevised W. and Sp.). 



PlaU LXXXL Figs. 7a, h, 8, 9, 10, 11, 12, 13. 



1891. S. A. Miller; Ad. Sheets 17tli Rep. Geol. Surv. Indiana, p. 40, Plate 7, Pigs. 9, 10. 



Syn. Eucalyptocrinus ccelatus Hall, 1865 (not 1843) ; Trans. Alb. Inst., p. 226 (Abstr., p. 32) ; 



and (?) 20tli Rep. N. Y. State Cab. Nat. Hist., p. 321 (revised edition, p. 363), and 28tli Pep., 



p. 142, Plate 16, Pigs. 1-10, and Plate 19, Pigs. 1-3 ; also llth Ann. Geol. Rep. Indiana, p. 274, 



Plate 16, Pigs. 1-10, and Plate 19, Mgs. 1-3. 

 Syn. Eucali/ptocrims mhglobosus S. A. Miller, 1891, Adv. Sheets 17th Rep. Geol. Surv. Ind., p. 37, 



Plate 7, rig. 3. 



Usually a little larger than E. coelatiis, shorter in proportion, and not 

 attenuate at the poles. General form from subgiobose 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. Eadials mod- 

 erately large, the lower ends curving abruptly inward, 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 



