BATOCEINID^. 549 



pieces, with a larger one at each bifurcation. Anus located at midway be- 

 tween the summit and the periphery. Column occupying two thirds the 

 width of the base ; axial canal large and pentalobate. 



Horizon and Locality. — Hamilton group, Louisville, Ky. 



Ty])es in the Knapp collection at New Providence, Ind. 



Bemarhs. — S. A. Miller, in his North American Geology and Palaeon- 

 tology, imdertakes to reinstate Lyon's prior name Adinocrinus cornigerus, 

 which he changes into G-enntwerinus cornigerus. The species was originally 

 described as Actinocrinus cornigerus, which Shumard, finding the name preoc- 

 cupied by Hall, changed into Actinocrinus kentuchiensis, by which it is labeled 

 in most of the collections. That the species was referred afterwards to a 

 different genus, does not restore the former name. 



Gennaeocrinus eucharis (Hall). 

 Plate XXXIV. Fig. I4. 



1862. Aclinocrimis eucharis — Hall; 15tli Rep. N. Y. State Cab. Nat. Hist., p. 130. 

 1881. Qetmceocmms eucharis — W. and Sp. ; Revision Paleeocr., Part II., p. 161 (Proceed. Acad. Nat. Sci. 

 Pliila., p. 335). 



We were unable to obtain for examination typical specimens of this 

 species, but from the description it appears to us that this form is very 

 closely allied to GenncBOcrinus kentuchiensis, with which it agrees in the form 

 of the base, arrangement of the brachials, and the number of arms. Accord- 

 ing to Hall, it is said to differ somewhat in the ornamentation. The ridges 

 which traverse the ray form a sharp carina, with strong nodes on the first 

 costals ; while on the centres of all the other plates there are low angular 

 nodes. Hall notices also a slight difference in the form of the dorsal cup, 

 but this is not borne out by the description. We are inclined to regard this 

 species as identical with the preceding one. 



Horizon and Locality. — Shales of the Hamilton group, Western New York. 



Type in the New York State collection at Albany. 



