218 CATALOGUE OF THE BLASTOLDEA. 



one hand, and E. elerjans, Conrad, sp., and E. lucina, Hall, sp., on the other, after 

 Hall's expressive figures of the two latter types. E. Conradi, Hall, sp., can hardly be 

 said to be described ; but if the protruding base to which Hall refers is a constant and 

 not merely an accidental character, herein lies a good point of separation from all 

 other species of the genus. We very much doubt if E. Kirkwoodensis, Shumard, 

 belongs to the present genus. At the time Shumard described this species he enter- 

 tained very elastic views about Elceacrinus, and it is possibly either a Cryptoblastvs or 



a Schizoblastits. Indeed the description of the "radial pieces occupying more 



than four fifths the entire length of the body " is fatal to any possibility of an affinity 

 with Elceacrinus ; and Shumard's statement that E. Kirkwoodensis is nearly allied to 

 E (Pentremitcs) mclo l is suggestive of its generic relations with Cryptoblastus. 

 E. annularis, Lyon, is easily distinguished by its markedly pentagonal outline (PI. II. 

 figs. 43, 44); E. obovatus, Barris, is so greatly elongated vertically that it can hardly 

 be mistaken for any other species ; and Barris's other species, E. meloniformi s, is 

 described as being smaller than E. Verneuili and most closely allied to E. eleyans. 

 Lastly, E. Canadensis, Mont., sp., is certainly distinct from E. Verneuili. It may be 

 a variety of E. lucina, as suggested by Mr. Montgomery, but after an examination of 

 Dr. Hinde's specimen (PL XVIII. fig. 19), we are inclined to regard it as a distinct 

 species. The ornamentation is certainly different from that of E. Verneuili. 



Locality and Horizon. Falls of the Ohio, near Louisville, Kentucky ; Columbus, 

 Ohio (Presented by Prof. H. A. Nicholson, M.D.) : Corniferous Limestone, Lower 

 Devonian. Clarke County 2 , Indiana: Upper Helderberg Group, Lower Devonian. 



According to Mr. S. S. Lyon E. Verneuili is found in "rocks of the Devonian 

 period, about five or six feet below the hydraulic cement beds, in a rock of peculiar 



physical character, distinguished as the Olivanite bed The beds at the Falls of 



the Ohio have probably been the most productive " 3 . 



Elceacrinus Verneuili, var. pomum, var. nov. 

 (PL II. fig. 46.) 



Remarks. We desire to separate from the typical form of E. Verneuili, as figured 

 by Roemer, Lyon, Bronn, and Billings, that variety which is distinguished by an 

 almost globular or round calyx. It does not possess the elongated nut-like form 

 of the figures given by the above-named authors, although it presents essentially the 

 same morphological characters. There is such a wide difference of form between the 

 original of our PL II. fig. 4G and Roomer's or Lyon's type, that many would consider 

 it a sufficient reason for elevating the former to specific rank. We have, however, 



1 Trans. St. Louis A.cad. Si i. L863, vol. ii. no. 1, p. 113. 

 - Lyon says Silver ami Fourteen-mile Creeks. 

 • Palaeontological Report,' Owen's 3rd Report Geol. Survey Kentucky, 1857, p. 492. 



