3/0 SMITHSONIAN INSTITUTION 



IBB low, not higher than a thin columnal. BB short. RR and IBr large 

 and of nearly equal size. IIBr 4, about half as wide as preceding plates ; higher 

 Br diminishing by about one-half at each bifurcation, but the long branches 

 themselves taper but little. 



This species is of remarkably graceful contour, with flowing lines and gentle curves. 

 It is not as well illustrated as is desirable, because overlooked until all the plates for the 

 Taxocrinidae were printed. The specimen figured on Plate LXXV is much flattened, and 

 does not show the almost cylindrical form of the uncompressed crown. The anal interradius 

 can scarcely be distinguished from the others, and upon the evidence of the specimens in 

 the New York State Museum originally studied it was thought to be undifferentiated. Material 

 subsequently collected by me at the type locality furnished some additional information, from 

 which it appears that the posterior basal is somewhat larger than the others, but of similar 

 shape ; and that the anal and other interbrachial areas may be occupied by plates or perisome 

 irregular in shape, size and position, so far as can be seen from the exterior, — largely due to 

 the close compression of the rays, whereby the interradial structures are pushed to the inside 

 and only incidentally exposed. There may be a small tube, invisible in the fossils as found, 

 and the lowest plate of such a tube would be entirely separated exteriorly from the posterior 

 basal, but supported on the shoulders of the radials — the basal not being suturally connected 

 with plates succeeding it. The specimens upon which we have to depend occur in a micaceous 

 sandstone, mostly in the form of natural moulds ; in the few which have the skeleton pre- 

 served the preservation is unfavorable for definition of the sutures and finer structures. With 

 the information now available, the reference to the present genus must be made with doubt. 

 An additional figure which I had prepared will be published in the forthcoming work on the 

 New York Devonian crinoids now in course of preparation by the New York State Museum. 



Type. The specimen figured is in the New York State Museum at Albany; others 

 studied are in the author's collection. 



Horizon and locality. Upper Devonian, lower beds of the Chemung, Belmont, New York. 



(?) Eutaxocrinus amplus n. sp. 



Plate L, fig. 10 



An extraordinarily large species. Crown elongate and robust ; the type and 

 only known specimen is 70 mm. high by 30 mm. wide; base, 10 mm. ; height to 

 width of calyx at IAx, 1 to 1.3; spread from base, 1 to 2. Side outline convex. 

 Arms very strong throughout, not diminishing rapidly upward; sutures broadly 

 arcuate. iBr present. Anal structures unknown. Surface smooth. 



IBB very low, not distinguishable from a columnal. BB small, in form 

 of low pentagons. RR and IBr three times as large as BB, not materially 

 widening upward, twice as wide as high, and of nearly equal size. IIBr 4; these 

 and higher Br in each division of about the same size, wider than high, and each 

 about two-thirds as wide as those of the preceding division. Branching above 

 IIBr somewhat irregular, with 5 to 10 plates in outer ramus of IIIBr and 4 to 7 

 in the inner, and longer intervals above ; one ray probably injured and recuper- 

 ated. Arms extending beyond fourth bifurcation, and infolding" at about that 

 level. iBr few, narrow and elongate, in 2 or 3 ranges; a small illBr present. 

 Column large, tapering rapidly from the calyx at first and then gradually until 

 becoming cylindrical, with slightly alternating columnals of even diameter. 



