﻿wood] new AND ol.D middle devonic crinoids 79 



species is filled with the matrix which may conceal this feature. 

 Other slight differences have been noted in the number of respiratory 

 pores and the number of higher interbrachial plates, but these may be 

 due to differences in the age of the individuals compared. It is 

 thought best, however, to retain D. excavatus as a distinct species 

 until further evidence can be obtained from specimens. 



Formation and locality. — Hamilton: Falls of the ( >hio. Reported 

 from Clark county, End. 



Cat. No. 058 M. [. T.. also 36,029 (Rominger collection) (J. S. 

 X. M. 



DOLATOCRINUS GRANDIS Miller and Gurley 



1894. Miller and Gurley, 111. State Museum Nat. Hist., Bull. 4, p. 14. 

 pi. ii, figs. 1. 2, 3. 



A well-preserved tegmen has been referred to this species. The 

 dorsal cup is not preserved, hence comparison could not be made with 

 the specimen of D. excavatus to determine if they belong to the same 

 species. 



Formation and locality. — Hamilton (?) : Falls of the Ohio. 



Cat. No. 657 M. I. T. ; also $6,026 (Rominger collection) V. S. 

 X. M. 



DOLATOCRINUS VENUSTUS Miller and Gurley 



1894. Miller and Gurley, 111. State Museum Nat. Hist., Bull. 4, p. 23. 

 pi. 11, figs. 16, 17, 18. 



A large individual differs from the type in the arrangement of the 

 arms as described under the genus Dolatocrinus, but this feature is 

 of little value for the identification of species. 



Formation and locality. — Hamilton : Clark county, Ind. 



Cat. Xo. 672 M. I. T. 



DOLATOCRINUS PULCHELLUS Miller and Gurley 



1895. Miller and Gurley, 111. State Museum of Nat. Hist.. Bull. 6, p. 

 55, pi. v, figs. 13, 14, 15. 



Formation and locality. — Hamilton: Charlestown, Ind. 

 Cat. Xo. 1,228 M. I. T. 



STEREOCRINUS Barris 



1878. Barris, Proc. Davenport Acad. Nat. Sci., 11, p. 282. 



STEREOCRINUS BARRISI Wachsmuth and Springer 



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

 326, pi. xxv, figs, ga, b. 



This species is represented in the National Museum collection by 

 many large and well-preserved specimens. 



