452 SMITHSONIAN INSTITUTION 



Type. In American Museum of Natural History, New York. 



Horizon and locality. Helderbergian, Oneida County, New York. In Hall's descrip- 

 tion the horizon is erroneously given as Upper Helderberg, and the locality as Eastman's 

 quarry, south of Utica, New York ; and my own specimens, originally in the Lyon collection 

 and obtained by exchange from Hall, are similarly labeled. Eastman's quarry, as known at 

 the time when these specimens were collected, was located ten or twelve miles southeast of 

 Utica, in the region of Litchfield, where the Coeymans limestone of the Helderbergian is 

 well developed and has yielded important collections of fossils lithologically similar to these. 



Edriocrinus holopoides n. sp. 

 Plate LXXVI, figs. 22a-b, 23 



Edriocrinus sacculus, in part, Ohern, Geol. Surv. Maryland, Lower Devonian, 1913, pi. 40, figs. 7, 8, 9 only. 



A large species, but smaller than E. sacculus, and with a shorter base; 

 represented by the complete crown. Base low and broad, usually standing 

 oblique to the surface of attachment ; wall thin, enclosing a broad, bowl-shaped 

 cavity not contracting downwards; expanding slightly towards the radials. 

 Calyx and arms otherwise similar to these of E. sacculus, except that the arms 

 are shorter and their inrolled cluster relatively not so wide. IBr 5 or 6, excep- 

 tionally 7 or 8. Height to width of base in average of 21 large and small 

 specimens, about 1 to 1.25. Dimensions of maximum crown: 45 mm. high 

 and 35 mm. wide at greatest expansion of arm cluster; calyx, 28 mm. high by 

 25 mm. wide at the arm bases; base, 17 mm. high by 19 wide; minimum crown, 

 8 mm. high by 7 mm. wide; minimum base, 4 mm. high by 6 mm. wide. Thus 

 up to their maximum the specimens of this species range in size about like 

 those of E. sacculus, but the latter becomes considerably larger. 



Type. The specimen figured in the Maryland Report, formerly belonging to 

 Mr. Hartly, is now in the author's collection. 



Horizon and locality. Oriskany sandstone, Cumberland, Maryland. 



