270 
ACTINOI’TERYGII. 
total length of the fish. 
kuiqi raugtu vi Li ic usu. Four clefts in suboperculum, extend - 
somewhat less than half its width. Dorsal fin slightly deeper t nan 
long, with twelve rays preceded by at least one short spiue, arising 
immediately in advance of the middle point between the ° e ' :1 l''^ 
and the caudal fin ; pelvic fins arising opposite the origin o 
dorsal, each with about six rays ; anal fin arising much nearer 
the caudal than to the pelvic pair, short-based, with eight r.iy^ 
preceded by two small spinos ; caudal fin with nineteen ra ' 9 ‘ 
basal spines or fulcra. Denticles on hinder border of scales ° n => 
and closely arranged. . 
Form. 4" Loc. Eocene (Green River Shales) : Wyoming, 
of 
P. 7491. Eine specimen 054 in length, described (with fifi u 
head and terminal vertebrae) by the present writer, oC 
Purchased, 
Notogoneus squamosseus (Blainville). 
i818. Cyprinm squamosseus, II. D. de Blainville, Nouv. Diet- 
Nat. vol. xxvii. p. 371. Tth6ne f 
1823. Eso.r sp., C. de Villeneuve, Statist. Dept. Bouches c u 
p. 8, pi. iv. fig. 4. 
1843-44. Spltenolepis squamosseus, 
p. 13, pt. ii. p. 87, pi. xlv. 
1896. Notogonem squamosseus, A. 
p. 502, pi. xviii. figs. 3, 4. 
L. Agassiz, Poiss. Foss. vol. v . P 
S. Woodward, Proc. Zool. SoCl 
Type. Imperfect fish ; olim Dree Collection. ^ p834)r 
The type species of Sphenolepis, Agassiz (non Nees, ^ 
attaining a length of about 0-6. Length of head with °P C ^. nC( j 
apparatus exceeding the maximum depth of the trunk, and c0 " ^ 
about four times in the total length of the fish. Four c ^ ca j e9 
suboperculum, extending less than half its width. I ins an 
as in the type species of Notogonem. 
Form. 4” Loc, Lower Oligocene : Aix-en-Provence. 
8052. A fine large specimen wanting part of the abdomin* ^ 
in front of the pelvic fins, also part ot the dorsa , , uin 
whole of the caudal fin. The characteristic su °P 
is displayed above the head, which is describe d an » 
in Proc. Zool. Soc. 1896, p. 502, pi. xviii. fi B - ^ an d 
expanded neurals in the anterior abdomina we p 
the vertebral centra in the caudal region <*io sv -iii. 
shown. A well-preserved scale is figured lot ■ Coll< 
fig. 4. 
