296 
ACTINOPTERTGII. 
P. 287. Slab, with numerous specimens, mostly immature ; Eetimo, 
Crete. ‘ Transferred from Mus. Tract. Geology., 1880. 
The following specimen may be a Cyprinodont, but is not 
generically determinable:— 
42783. Type specimen of Lehias crassus, described and figured by 
T. C. Winkler, Descript. Poiss. Poss. d’Oeningen (Natnurk. 
Yerhandl. Holland. Maatsch. [2] vol. xiv. 1861), p. 40, 
pi. iv. fig. 13; Upper Miocene, Oeningen, Baden. De¬ 
ferred to Prolehias by H. E. Sauvage, Bull. Soc. Hist. Hat. 
Toulouse, vol. viii. (1874), p. 190. Van Breda Coll. 
The following imperfectly defined genus and species, which is not 
represented in the Collection, is also referred to the Cyprinodontidae 
by Sauvage:— 
Pcecilops hreviceps, A. Pomel, Catal. Method. Yert. Boss. Loire 
(1853), p. 135 ; H. E. Sauvage, Bull. Soc. Hist. Hat. 
Toulouse, vol. viii. (1874), p. 195 {Poecilops). —Lower 
Miocene (Lignite): Menat, Puy-de-D6me. 
A comparatively large skull from the Lower Pliocene, Siwalik 
Hills, India, now in the Dublin Museum, is provisionally referred 
to a Cyprinodont by B. Lydekker, Palseont. Indica, ser. x. vol. iii. 
(1886), p. 256, woodc. 
The following genera and species, regarded by Cope as possibly 
Cyprinodont, are too imperfectly known for systematic deter¬ 
mination :— 
Gepliyrura concentrica, E. D. Cope, Amer. Hat. vol. xxv. (1891), 
p. 654.—Lower Tertiary (?) ; Bee Hills, South Dakota, 
U. S.A. [Imperfect fish.] 
Prohallostomus Jongulus, E. D. Cope, ibid. p. 655.—Ibid. [Ditto.] 
{/ 
Suborder V. OSTARIOPHYSL 
" Yertebral centra always complete constricted cylinders ; a few 
anterior vertebrae usually coalesced and fused with the occiput; a 
chain of small bones (weberian ossicles) connecting the air-bladder 
with the auditory organs. Mandible simple, each ramus consisting 
only of two elements (dentary and articulo-angular). Pectoral arch 
suspended from the cranium ; precoracoid arch present; pectoral 
fin with not more than four or five basals. Pelvic fins abdominal. 
In the living forms—air-bladder, if well developed, connected with 
