146 CATALOG OF FOSSIL FISHES IN THE MUSEUM 



E 1901 Nine teeth, varying from lo to 13 mm. (15 if restored) in 

 height from lower margin of base to apex of principal 

 cones. One shows the complete root with the ''button;" 

 another, which lacks the distal halves of the cones and 

 the posterior portion of the root, has a large central 

 denticle, nearly as large as the principal cones. This 

 tooth is of the kind usually referred to the genus Ph(B- 

 bodus; but there can be no question that it is of the same 

 species as the other teeth in this lot. The ornamentation 

 is nearly effaced, but it was apparently similar to that in 

 the other teeth. Another tooth lacks all trace of a 

 median denticle; and still another, has a minute denticle 

 on either side, between the median and the lateral cones. 

 Conodont bed (L. Genesee); Eighteen Mile Creek, 

 near North Evans, Erie County, N. Y. Collected by W. 

 L. Bryant. 



E 1902 Seven teeth, from 9 to 14 mm. in height; 5 have the root 

 well preserved. These teeth have finer striations than 

 the preceding. 

 Other data same as preceding. 



E 2490 One cone with portion of the root of a large tooth, in matrix. 

 Other data same as preceding. 



Dittodus striatus (Eastman) 



Diplodus striatus Eastman, Journ. Geol., vii, 490, pi. vii, figs. 3, 4. 1899. 



This species occurs in the Conodont bed associated with D. priscus, 

 but it is very much rarer, there being only a single specimen in the 

 collection. T^e species was originally described from "only a few 

 fragmentary specimens," and was stated to attain about twice the 

 size of D. priscus. Our specimen is a perfect tooth, and smaller 

 than large examples of D. priscus. It is distinguished from the latter 

 more especially by the much finer and much more numerous striae. 

 In our specimen the striae are not so strongly curved around the tooth, 

 as in the type figured by Eastman.^^ However, as there, no doubt, 

 was variation in this regard, and since our specimen so closely agrees 



53 N. Y. Stale Mus., Mem., lo, pi. i, fig. ii. 



