108 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



specimens. In other species of the genus, however, Mr. Wachsmiith 

 states that some of the sutures of the summit phites are as frequently 

 anchylosed as not, and it may be that this is the case with the suture 

 in question in the few Canadian examjjles of N. elegans that have yet 

 been collected. Further, the outer margin in each of the four large 

 proximals in the New York specimens of JV. elegans is represented by 

 Professor Hall, as well as by Mr. Wachsmuth, as convex in the middle 

 and concave only at the sides, whereas the outer margin in each of the 

 larger proximals of the Canadian specimens is uniformly though rather 

 8halIowl3r concave. Still, these differences, whether real or ajiparent, 

 can scarcely be regarded as of specific importance, and Professor E. 

 P. Whitfield, who has kindly compared some of the specimens collected 

 by the P^ev. E. Currie with Conrad's type of iV. elegans now in the 

 American Museum of Natural History in New York city, entertains 

 no doubt as to their identity with that species. 



Some of the specimens collected by Mr. Currie are more elongated 

 than others, and it was at one time supposed that the most elongated 

 forms might possibly be referable to iV. lucina, Hall, but in that species, 

 as shown in an authentic specimen forwarded by Professor Whitfield 

 and as stated by Prof. Hall, the sides are deeply and angularly concave 

 whereas those of iV! elegans are nearly flat. 



Granatocrinus Leda, Hall (Sp.) 



Plate 14, figs. 3, 3 a, 3 b, 3 c, 3d and 3f. 



Pentremites leda, Hall. 1862. Fifteenth Rep. N. York St. Cab. Nat. Hist., p. 149, 



pi. 1, fig. 11. 

 Peji(remifidea fcda. Hall ? sp., Etheridge and Carpenter. 1886. Cat. Blast, in Brit. 



Mus., pp. 12, 17, 104, pi. 5, figs. 12, 13 and 14. 



Near Thedford, Eev. Hector Currie, 1878 : three perfect and beauti- 

 ful specimens, two of which are entirely free from distortion. 



All three have been directly compared with two of the types of 

 Pentremites Leda kindly forwarded by Professor Hall, which latter, 

 however, are crushed nearly flat laterally and do not shew any of the 

 spiracles. The only appreciable difference that the writer has been 

 able to detect between the Canadian and the New York State speci- 

 mens, is that in the former the whole surface of each of the inter- 

 radials, all of which ai-e visible in a side view, is distinctly but irregu- 

 larly corrugated when examined with a lens, while in the latter most 

 of the surface is covered by fine lines which follow the contour of each 

 plate, and by only a few and less distinct corrugations which are often 



