TAXOCRINIDAE 363 



ent from a glance at the figures. The best specimen is the one figured by Schultze, now in 

 the Museum of Comparative Zoology, Harvard. His figure shows only two plates in the 

 anal series, but further cleaning of the specimen has developed three more above (PL XLIX, 

 fig. 10b). I have copied Muller's figures of his type in the Berlin Museum, reducing them to 

 natural size ; it is a younger individual than the other, with a more slender calyx, and Muller's 

 figure doubtless shows the anal series located more symmetrically than it really is. The only 

 other specimen known is one in the University of Bonn. 



Types. Muller's original is in the Anotomische Museum at Berlin; Schultze's in the 

 Museum of Comparative Zoology, Harvard College. 



Horizon and locality. Middle Devonian, Eifel limestone ; Gerolstein and Kerpen, Eif el 

 Mountains, Germany. 



Eutaxocrinus juglandiformis (Schultze) 

 Plate XLIX, figs. 11-12 



Taxocrinus juglandiformis Schultze, Mon. Echinodermen Eifler Kalkes, 1867, p. 35, pi. 4, figs. 4, 4«, b. — 



Wachsmuth and Springer, Revision Palaeocrinoidea, pt. I, 1879, p. 48. 

 Cyathocrinites, Quensledt, Handbuch Petrefaktenkunde, 1852, p. 617, pi. 54, fig. 23; ibid., 1885, p. 945, 



pi. 75, fig. 12. 



A medium-sized species. Crown short, broadly rounded below, widest 

 about IIIBr, where height to width is 1.2 to I. Calyx very low convex, height 

 to width about 1 to 3.6, and spread from base to top of IAx 1 to 3. Height of 

 crown in one of the types 27 mm. ; width, 22 mm. ; base, 3.6 mm. Arms broad, 

 diminishing rapidly at the bifurcations which extend to four. Sutures straight 

 in lower part, becoming slightly sinuous above. No regular iBr; areas occupied 

 by perisome. Anal tube broad, composed of very short plates. Surface smooth, 

 or slightly wrinkled. 



IBB low, forming a flat disk covered by the column and nearly of its 

 diameter. BB low, visible chiefly in a narrow rim outside the column facet, or 

 with small salient points; excepting post. B, which is long and broad, concave 

 distally, supporting a very large anal tube composed of plates four times wider 

 than high, bordered on either side by integument of numerous small convex 

 plates, the arms meeting above them. RR large, longer than either IBr; these 

 are wider than RR, increasing in width upward, as do the IIBr also; subsequent 

 arm divisions little over half the width of those preceding, and enlarging slightly 

 at the axillaries. All brachials from radials to the higher divisions wider than 

 high, the lower ones two or three times. IIBr 3. Column unknown, facet 

 slightly smaller than BB circlet. 



This species is well formed for the accommodation of interbrachials, but they have not 

 passed the stage of irregular perisome, in which, however, the plates are sharply convex. 

 It is remarkable among its congeners for the large size — especially length — of its radials, and 

 the extreme convexity of the calyx ; the only species at all comparable with it in the latter 

 respect being E. eifelensis. It is also remarkable for the very large anal tube, composed of 

 short and wide plates resembling those of the rays ; this is well shown in both specimens, 

 although displaced in one ; the structure at its base in the other is rather peculiar, there being 

 an irregular plate inserted at the left of what I suppose to be the posterior basal. 



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