CLUPEIDiE. 
143 
caudal region comparatively stout and slightly longer than the 
abdominal region. Dorsal region much elevated, the margin rising 
to the origin of the dorsal fin, where it is almost angularly bent. 
Length of head with opercular apparatus equalling about two thirds 
the maximum depth of the trunk, which is nearly or quite as great 
as its length from the pectoral arch to the base of the caudal fin. 
Abdominal vertebrae 14 to 16, caudals 18 in number. Pectoral fins 
with rays sufficiently long to reach the pelvic pair, which arise 
opposite the origin of the dorsal ; dorsal fin longer than deep, with 
about 17 rays, its extent equalling the distance from the occiput to 
its origin, but much exceeding that from the caudal fin to its hinder 
en d ; anal fin much extended, with 25 rays, arising in advance of 
the hinder end of tho dorsal. Dorsal scutes about twice as broad as 
long, with a longitudinal median keel ; ventral ridge-scales about 
16 in number, not serrated, slightly increasing in size baekyvards. 
Form. Sf Loc. Upper Cretaceous : Hakol, Mt. Lebanon. 
96. Type specimen, figured Joe. cit. pi. i. fig. 3. Lewis Coll. 
H 96 a. Smaller fish displaying tho general form and proportions 
of the species, figured loc. cit. pi. i. fig. 4. Lewis Coll. 
P- 83. Imperfect fish apparently shortened by crushing, figured 
loc. cit. pi. i. fig. 2. Lewis Coll. 
p - 84, P. 86, P. 87. Three more imperfect specimens shortened and 
deepened by crushing. The second displays tho left 
pectoral fin, the third the broad dorsal scutes, which 
exhibit two or throe posterior denticulations on each side 
in addition to the median point. Lewis Coll. 
Diplomystus longicostatus, Cope. 
1886. Diplomystus longicostatus, E. D. Cope, Proc. Amer. Phil. Soc 
vol. xxiii. p. 3. 
1895. Diplomystus longicostatus, A. S. Woodward, Ann. Mag. Nat. 
Hist. [6] vol. xv. p. 2, pi. i. fig. 1. 
Fype. Nearly complete fish ; Cope Collection. 
A deep-bodiofi species attaining a length of about O’ 13, the caudal 
r egion comparatively small and slender, scarcely more than half as 
°ng as the abdominal region. Dorsal region much elevated, the 
margin rising to tho origin of the dorsal fin. Length of head yvith 
epercular apparatus scarcely exceeding half the maximum depth of 
Ihe trunk, yvhieh is nearly as great as its length from the pectoral 
arch to the base of the caudal fin. Abdominal vertebra; about 24 
1,1 number, caudal vertebrae not more than 1 2. Pectoral fins small ; 
