﻿/6 SMITHSONIAN MISCELLANEOUS COLLECTIONS [VOL. 47 



DOLATOCRINUS MAJOR Wachsmuth and Springer 



1897. Wachsmuth and Springer, North Amer. Crinoidea Camerata, p. 

 322, pi. xxv, fig. 5. 



A large specimen from Columbus, Ohio, is of this species. The 

 figure of the type specimen shows two or three plates in the second 

 row of interbrachials, while the description reads : " The plate of the 

 second row is approximately as large as the first costal, but higher 

 than wide and hexagonal." In this respect the National Museum 

 specimen agrees with the description. 



Formation and locality. — Onondaga: Price's quarry, Columbus, 

 O. ; Falls of the Ohio. 



Cat. No. 42,428 (Ulrich collection) U. S. N. M. 



DOLATOCRINUS GLYPTUS (Hall) 



1862. Cacabocrinus glyptus Hall, 15th Rep't New York State Cab. Nat. 

 Hist., p. 140. 



Formation and locality. — Onondaga : Dublin, O. Hamilton : 

 Beargrass creek, Louisville, Ky. The species is reported from Co- 

 lumbus, Ohio; Hamilton (Livingston county), and Pavilion (Gen- 

 esee county), New York. 



Cat. No. 42,410 and 42,432 (Ulrich collection) U. S. N. M. 



DOLATOCRINUS ORNATUS Meek 



1871. Meek, Proc. Acad. Nat. Sci., Phila., p. 57. 



This species is regarded by Wachsmuth and Springer as a synonym 

 for Dolatocrinus glyptus (Hall), but the specimens in the collection 

 of the National Museum do not seem to warrant such a reference. 

 They agree perfectly with the original description of D. ornatus while 

 differing widely from that of D. glyptus. The surface of the latter, 

 as shown by the figures of Wachsmuth and Springer, 1 bears a few 

 short, discontinuous ridges, or according to the original description, 

 " lines of nodes," while that of D. ornatus, as it appears on the sur- 

 face of an exquisitely preserved specimen, is closely covered with 

 thin, sharp carinas which are continuous from the center of one plate 

 to that of its neighbor. Distinct nodes, if present at all, are not a 

 characteristic feature of the ornament. The base of D. ornatus is 

 deeply indented, the depression including about one-third of the 

 radials. That of D. glyptus is flat. 



No figure accompanies the original description of D. ornatus, but 



1 North American Crinoidea Camerata, pi. xxvi, figs. 2a, b. 



