FOSSIL CRINOIDS. 133 



far as known. Radial facets shallow, filling almost the entire distal face of the 

 plate, and directed obliquely upward. Arms long and heavy, broadly rounded 

 or almost flat, closel}^ abutting; brachials broad and long, except the first, which 

 is usually very short; ventral furrow broad and shallow, with large covering 

 plates, about five pairs to a plate of average size. Surface smooth. Column 

 large, with very conspicuous nodals about twice the diameter of the internodals, 

 and three or four times as long; there is considerable variation in the length 

 of these plates, as well as the number in the internodes. 



Types. In the author's collection. 



Horizon and Locality. Onondaga Group of the Middle Devonian. Near 

 Le Roy, Livingston county, New York. 



This species and genus are founded upon a series of excellent specimens, 

 eight of them with more or less of column and arms attached, and three more 

 detached cups showing the base and anal opening. They show a remarkable 

 constancy in the characters above stated, and I have figured a thoroughly 

 representative selection from them. It is singular that with all the difficulty 

 in getting at the basal structure of Arachnocrinus, it was so readily found in this; 

 the infrabasal disk is larger, and the exterior sutures not so straight. One 

 specimen (Fig. 3, PI. Ill) is very much larger than any of the others; the figure 

 is not enlarged, but .shows the relative natural size. 



SCHULTZICRINUS (?) ELONGATUS, Sp. nOV. 



Plate III, figs. 7a, b, c, d, e. 



I have figured under this name a specimen found associated with the fore- 

 going, knowing that it may not belong to this genus. I wanted to give it a 

 name for reference, in hope that future discoveries may throw more light upon 

 it. It has similar broad, upright, closely abutting arms, but they become narrow, 

 deep, and rounded distally (compare Figs. 7e with \d). Differing from the 

 type species, and all others of this group, the arms distally become strongly 

 ornamented with fine, sharp pustules (Fig. 7c). The cup is of a verj' different 

 style from that of the others, spreading upward instead of contracting. Unfor- 

 tunately we have but the one specimen, and a fragment of cup that may be the 

 same; and with so much lacking in this, its real generic characters remain 

 obscure. I doubt if it has the anal opening through the cup. It will be observed 

 that the specimen has a tripartite axial canal in the column; and as this had not 

 been observed in any of the other American forms of this group, except Miss 



