NIAGARA GROUP. 181 



574. 3. GLYPTOCRINUS 1 



Pl. a XLI. Fig. 4. 



Several large joints have been found, apparently belonging to a new species of this genus. 

 The character is more like the species of the Hudson-river group. 



Position and locality, Reynale's basin, lower part of the group. 



575. 1. ICHTHYOCRINUS'? CLINT0NENSIS(n.5p.). 



Pl. a XLI. Fig. 5. 



The specimen consists of the arms and fingers, which are not tentaculated : the arms divide 

 at irregular distances from the base, and are each composed of a single quadrangular series of 

 plates, except the joint at the bifurcation, which is pentagonal. 



I have placed this provisionally in the Genus Ichthyocrinus, from the similarity in the 

 arrangement and mode of bifurcating of the arms and fingers, to the one in the Niagara group. 

 It is, however, an entirely distinct species, as clearly seen in the form of the plates in the 

 fragment. 



Position and locality. In the lower shaly calcareous portion of the group at Reynale's basin, 

 Niagara county. (Collection of Col. Jev.'ett.) 



Pl. a XLI. Fig. 6 a, h, c. 



Body 1 Arms simple, undivided, semicylindrical, furnished with long slender linear tentacula 

 which are attached to the two inner sides or angles, the convex side being outwards ; joints of 

 the tentacula long, angulated at the margins, and the centre depressed or grooved. Column 1 



All we know of this species is the specimen figured, which presents the characters given 

 above. The tentacula are very much obscured by shaly matter, and they appear like single, 

 slender, rather rigid branches ; but in one or two points, the true jointed character appears. 

 From the character of these arms with spreading tentacula, I infer that they are simple from 

 their origin. By the side of the arms is a small rounded column, which may perhaps belong to 

 this species. 



Fig. 6 a. The specimen of the natural size. 

 Fig. 6 b. The tentacula enlarged. 

 Fig. 6 c. Section of the same. 



Position and locality. In the lower green shale near the Pentamerus limestone, Ontario, 

 Wayne county. 



