1879.] NATURAL SCIENCES OF PHILADELPHIA. 213 



B. Subgenus GNORIMOCRINUS Wachsm. & Spr. 

 (yvcepifx.i(, noble ; Kptvo*, a lily.) 



In form and general habitus closely resembling Taxocrinus. 

 Arms comparatively longer, figure irregular, lacking the bilateral 

 symmetry of that genus. The basal (subradial) on the posterior 

 side is exceedingly large, reaching almost up to the top of the ad- 

 joining first radials. The first anal plate, instead of resting upon the 

 truncated upper side of that basal, leans against the oblique right 

 side and the adjoining first radial. A second series of anals, gener- 

 ally composed of two plates, rests above the basal and first anal 

 plate. All succeeding pieces are small, frequently, but not always, 

 quadrangular, and form as in Taxocrinus a short and narrow- 

 lateral proboscis which, however, is here pushed over toward the 

 right side of the body, thereby destroying the symmetry which is 

 characteristic of that genus. Arms placed apart, outer face 

 rounded, bifurcating unequally by throwing off branches toward 

 the inner side of the ray, the outer side forming almost a straight 

 line. Column composed of long and short and wide and narrow 

 joints which alternate from the top, not exclusively short joints at 

 the top as in most Taxocrini. 



We place here the following species: 



*1878. Gnorimocrinus Austini Angelin. (Taxocr. Austini.) Iconogr. Crin., p. 9, 

 pi. 19, figs. 11 and 11a. Upper Silur. Gotland, Sweden. 



*1878. Gnorimocr. distensus Angelin. 1 (Taxocr. distensus.) Iconogr. Crinoid , p. 

 9, pi. 26, figs. 7, 7 a. Upper Silur. Gotland, Swed. 



*1866. Gnorimocr. excavatus Shultze. (Zeacr. excavatus.) Echinod. d. Efl. 

 Kalkes, p. 39, pi. 7, fig. 2. Devonian. Eifel, Germ. 



This species differs from the rest in having an excavated base. 



*1876. Gnorimocr. expansus Angelin. (Taxocr. expansus.) Iconogr. Crinoid., p. 



9, pi. 20, figs. 15, 16. Upper Silur. Gotland, Swed. 

 *1878. Gnorimocr. interbrachiatus Angel. (Taxocrinus interbrachiatus.) Jconog. 



Crinoid., p. S, pi. 29, figs. 9, 10. Upper Silur. Gotland, Swed. 

 *1879. Gnorimocr. Loveni Wachsm. & Spr (Cyathocr. interbracbiatus Angel.) 



Iconogr. Crinoid., p. 23, figs. 2, 2 a. Upper Silur. Gotland, Swed. 



This species differs from Cyalhacrinus both in the arrangement 

 of the anal plates and in the presence of interradials. Gnorimocr. 

 interbrachiatus being preoccupied, we have named it in honor of 

 Prof. Loven of Stockholm. 



1 In this species, as also Gnorimocr. punctatus, the irregular arrangement 

 of the anal area is not sufficiently shown iu the figures, and both may pos- 

 sibly belong to Taxocrinus. 



