CYPRINODONTIDJE. 
291 
of the trunk, which is contained about three and a half times in 
the length to the base of the caudal fin. Vertebrae about 12 
ln the abdominal, 20 in the caudal region. Dorsal fin with 9 
or 10 rays, arising immediately behind the origin of the anal fin, 
which comprises from 12 to 14 rays ; caudal fin truncated or 
Ver y slightly forked. 
Form. § Loc. Lower Oligocene : Aix-en-Provence. 
4236. Large slab of freshwater marl with shoal of fishes. 
Enniskillen Coll. 
20071. Small slab with similar shoal. 
Presented by S. P. Pratt, Esq., 1846. 
36131. Two similar small slabs. 
Presented by Sir Roderick I. Murchison , K.C.B., 1S60. 
1831. Two smaller slabs and one detached specimen. 
Egerton Coll. 
21396. Two small slabs. Purchased, 1S47. 
43438. Small distorted fish. 
Presented by Kenneth Murchison, Esq., 1872. 
21397. Two small distorted specimens. Purchased, 1847. 
Prolebias furcatus (Winkler). 
( ? ) 1832. Lebias perpusitlus, L. Agassiz, Neues Jahrb. p. 135 (name 
only). 
(f) 1839. Lebias perpusillus, L. Agassiz, Poiss. Foss. vol. v . pt. ii. P' 49, 
pi. xli. figs. 3-5. [Imperfect distorted fish; ohm Lavater Coll.J 
] 861. Lebias furcatus, T. C. Winkler, Descript. Poiss. Foss. d'Oeningen 
(Natuurk. Verhandl. Holland. Maatsch. [2] vol. xiv.), p. 44, pi. iv. 
fig. 15. . 
(?) 1874. Prolebias pcrpusilliiA, H. E. Sauvage, Bull. Soc. Hist, i at. 
Toulouse, vol. viii. p. 194. 
1874. Prolebias furcatus, II. E. Sauvage, ibid. p. 190. 
Type. Imperfect fish ; British Museum. 
A very small species with distinctly forked caudal fin. Slightly 
mor « slender than the type species, but vertebral column and all 
fins except the caudal similar. 
Form, cf Loz. Upper Miocene : Oeningen, Baden. 
42784. Type specimen described and figured by Winkler, loc. cit. 
The stain on the matrix causes the pedicle of the tail to 
appear more slender than in reality. V an Breda Coll. 
TT 2 
