276 
ACTIKOPTEEYGHI. 
total length of the fish. Pour clefts in suboperculum, extending 
somewhat less than half its width. Dorsal fin slightly deeper than 
long, with twelve rays preceded by at least one short spine, arising 
immediately in advance of the middle point between the occiput 
and the caudal fin ; pelvic fins arising opposite the origin of the 
dorsal, each with about six rays ; anal fin arising much nearer to 
the caudal than to the pelvic pair, short-based, with eight rays 
preceded by two small spines; caudal fin with nineteen rays and 
basal spines or fulcra. Denticles on hinder border of scales long 
and closely arranged. 
Form, Log. Eocene (Green Eiver Shales): Wyoming, U.S.A 
P. 7491. Eine specimen 0*54 in length, described (with figure of 
head and terminal vertebrse) by the present writer, loc. cit. 
Purchased,, 1895. 
Notogoneus squamosseus (Blainville). 
1818. Cyprinus squamosseus,TL.'D. de Blainville, Nonv. Diet. d’Hist. 
Nat. vol. xxvii. p. 371. 
1823. Esox sp., C. de Villeneuve, Statist. Dept. Boiiches du Ehone,- 
p. 8, pi. iv. fig. 4. 
1843-44. Splienolepis squamosseus, L. Agassiz, Poiss. Foss. vol. v. pt. i. 
p. 13, pt. ii. p. 87, pi. xlv. 
1896. Notogoneus squamosseus^ A. S. Woodward, Proc. Zool. Soc. 
p. 502, pi. xviii. figs. 3, 4. 
Type. Imperfect fish ; olim Dree Collection. 
The type species of Splienolepis, Agassiz (non Nees, 1834), 
attaining a length of about 0*6. Length of head with opercular 
apparatus exceeding the maximum depth of the trunk, and contained 
about four times in the total length of the fish. Four clefts in 
subot)erculum, extending less than half its width. Fins and scales 
as in the type species of Notogoneus. 
Form. ^ Loc. Lower Oligocene : Aix-en-Provence. 
8052. A fine large specimen wanting part of the abdominal region 
in front of the pelvic fins, also part of the dorsal, and the 
whole of the caudal fin. The characteristic suboperculum 
is displayed above the head, which is described and figured 
in Proc. Zool. Soc. 1896, p. 502, pi. xviii. fig. 3. The 
expanded nenrals in the anterior abdominal region and 
the vertebral centra in the caudal region are also well 
shown. A well-preserved scale is figured loc. cit. pi. xviii. 
fig. 4. ManteJl Coll. 
