TAXOCRINIDAE 369 



Eutaxocrinus curtus (Williams) 

 Plate L, figs. 6-9 



Taxocrinus curtus Williams, Proc. Acad. Nat. Sci. Philadelphia, 1882, p. 30. — Wachsmuth and Springer, 

 Revision Palaeocrinoidea, pt. 3, 1886, p. 144.— Kindle, Bull. Amer. Palaeontology, II, 1896, p.' 34. 



A small species. Crown short, stout, more or less rotund, widest about the 

 upper IIBr; height to width about 1 to 1. Dimensions of mature specimen, 

 16 mm. high by 15 wide ; base, 4.5 mm. Calyx low, broadly expanding with side 

 outline convex; height to width 1 to 2; base broad; spread of calyx from base 

 to IAx, 1 to 2.2. IBB hidden by column. BB very small. Rays wide and heavy, 

 and strongly increasing in width from RR to axillary IIBr, above which the 

 divisions become very small, in young specimens looking like mere threads. No 

 iBr, and spaces very narrow and elongate. IIBr 3 or 4, irregularly. Column 

 large, enlarging at the calyx with thin columnals, which alternate with longer 

 and more convex ones farther down ; mode of termination unknown. 



This species is found associated with E. ithacensis, from which it is well distinguished 

 by its broad and short crown and more blunt habit generally. Williams's description was 

 made from a young specimen, on which he noted as a character that the stem does not enlarge 

 next to the calyx. This is not the case in the adult, like the fine specimen from the New 

 York State Museum shown by figure 8 of Plate L ; and there is probably a difference among 

 specimens in this respect due to age. The appearance of branching roots in figure 6 is mis- 

 leading, caused by incidental depressions in the somewhat injured natural mould from which 

 the impression was taken. Williams gives the horizon as Portage. There is reason to believe 

 that the type specimen, which he did not figure but of which he sent me an impression from 

 the original natural mould, identified as the type, was associated with variety alpha rather 

 than with ithacensis, and therefore belongs to the Chemung. The originals of figures 8 and 9 

 are from Chemung beds at Avoca, Steuben County, in which E. alpha also occurs ; the two 

 species being thus associated at this locality probably occur in the same formation at the type 

 locality also. The horizon of figure 7 is doubtful, and I regard figures 6, 8 and 9 as con- 

 trolling for the characters of the species. 



Type. Museum Cornell University, Ithaca, New York. 



Horizon and locality. Upper Devonian, Chemung group ; Ithaca and Avoca, New York. 



(?) Eutaxocrinus pulcher n. sp. 



Plate LXXV, fig. 10 

 A medium-sized species, of delicate and graceful habitus. Crown elongate, 

 very narrow, spreading but little from the base where it is flush with the top 

 columnal. An average uncompressed specimen has the crown 40 mm. high; 

 10 mm. wide; base, 6 mm; calyx at top of axillary primibrach about as high as 

 wide. iBr wanting or irregular; when present, they are usually hidden by close 

 apposition of the arms; anal interradius extremely narrow, with post. B but 

 slightly differentiated; anal tube not observed, but must have been very small. 

 Arms tapering gradually to the fourth bifurcation, with relatively long brach- 

 ials, and upper division series long and slender. Sutures strongly arcuate 

 throughout. Column large, with wide proximal enlargement. Surface smooth. 



