OSTEOGLOSSIDJ.. 
/O 
Dapedoglossus testis^ Cope. 
1877. Dai^edoglossus testis, E. D. Co^De, Bull. U.S. Geol. Surv. Territ. 
vol. iii. p. 807. 
1884. Dapedoglossus testis, E. D. Cope, Vert. Tertiary Form. West, 
Book I. (Hep. U.S. Geol. Surv. Territ. vol. iii.), p. 71, pi. vii. 
fig. 1, pi. viii. figs. 1, 2. 
Type. iN’early complete fish. 
The type species, attaining a length of about 0’25. Length of 
head with opercular apparatus contained about four times, and 
maximum depth of trunk much less than three times in the total 
length of the fish. Anterior stout pectoral fin-ray closely articulated 
in its distal half, extending nearly as far backward as the rays of 
the pelvic fins, which are small and arise somewhat nearer to the 
anal than to the pectoral pair; dorsal fin with about 20 rays, 
arising behind the origin of the anal fin, which is more extended 
and comprises about 27 rays. Exposed aspect of scales very finely 
granulated, not grooved. 
Form. ^ Log. Eocene (Green Biver Shales); Wyoming, U.S.A. 
P. 5824. Imperfect specimen about 0*19 in length, displaying the 
reticulate middle layer of the scales. By exchange, 1888. 
P. 7488. A much smaller specimen exhibiting the dentition, 
branchiostegal rays, and fins. Purchased, 1895. 
Dapedoglossus sequipinnis. Cope. 
1878. Dapedoglossus cequipinnis, E. I). Cope, Bull. U.S. Geol. Surv. 
Territ. vol. iv. p. 77, 
1884. Dapedoglossus cequipinnis, E. D. Cope, Vert. Tertiary Form. 
West, Book 1. (Rep. U.S. Geol. Surv. Territ. vol. iii.), p. 73, 
pi. vii. fig. 2. 
Type. IS’early complete fish. 
A very small species, difi“ering from the type in the less elongation 
of the anterior pectoral fin-ray and in the almost equal size and 
extension of the dorsal and anal fins, each of which seems to 
comprise about 22 rays. 
Form. Loc. Eocene (Green River Shales) : Wyoming, U.S.A. 
Not represented in the Collection. 
The following species have also been founded on fragmentary 
specimens, of which there no examples in the Collection :— 
Dapedoglossus acutus, E. D. Cope, Vert. Tertiary Form. West, 
Book I. (Rep. U.S. Geol. Surv. Territ. vol. iii. 1884), 
