364 SMITHSONIAN INSTITUTION 



The basals are decidedly irregular in their development, and in figure 11c they seem 

 to have no salient angles ; in figure 12 it is possible that the triangular plate in the anal inter- 

 radius is a basal, and the large plate to its right the first plate of the tube, thus making it still 

 further resemble the rays. Schultze in his description says the arms have jointed pinnules at 

 least in the upper part. This is an error ; neither of the types show it, and he was probably 

 misled by the pinnules seen in figure 11a which belong to an arm fragment from some other 

 specimen, lodged in the interradius. My figures are made direct from the types — the only 

 specimens I know. 



Types. The complete specimen shown by figures na-c is in the Museum of Compara- 

 tive Zoology at Harvard College. That of figure 12 is in the author's collection. 



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

 Germany. 



Eutaxocrinus eifelensis n. sp. 



Plate XLIX, fig. 13 



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

 about IIIBr, where height to width is about 2 to 1. Calyx broadly spreading 

 1 to 3 at I Ax, where height to width is about 1 to 2 ; side outline convex. Crown 

 of type specimen 30 mm. high by 15 wide; base, 4 mm. Rays with a median 

 angular elevation extending into the arms. Arms long, relatively narrow, 

 tapering slowly and infolding about the fourth bifurcation. Sutures arcuate. 



IBB concealed by the column. BB small. RR and IBr short and wide, in- 

 creasing in width upward leaving only narrow spaces for iBr, probably occupied 

 by perisome, no iBr being seen. Brachials angular at the sides, with tendency 

 to interlock, but without fringe or buttress. II'Br 3, short and wide; IIIBr 5 

 to 7 in outer ramus, 4 or 5 in inner; next division very long, branching at 15 to 

 20 brachials on the outer ramus, the inner perhaps remaining simple. Anal side 

 unknown. Column large, long, tapering slightly from calyx for a short distance, 

 with very thin columnals, which gradually increase in length without any marked 

 point of change until they become uniformly about half as long as wide, when 

 the column begins to enlarge again distally and the columnals become somewhat 

 shorter ; there is no alternation of columnals in length or diameter. 



This Middle Devonian species is founded upon an excellent specimen from the Eifel 

 which could not be identified with any described form, and is readily distinguished by its 

 elongate habitus,- combined with broadly spreading calyx and the angular brachial series. 

 The stem differs materially from that of all the American species in its lack of alternating 

 columnals ; whether it does also from that of the other Eifel species we do not know, as the 

 stem is not preserved in any of them. In the fact of enlarging distally it resembles that of 

 E. ithacensis. 



Type. Author's collection. 



Horizon and locality. Middle Devonian, Eifel limestone or Stringocephalen-Kalk ; Pelm, 

 Eifel Mountains, Germany. 



