292 
ACTINOPTEEYGII. 
42800. Two minute specimens on one slab. Yan Breda Coll, 
42801. Distorted fish, the anterior portion vertically crushed. 
Van Breda Coll, 
Prolebias gregatus, Sauvage. 
1869. Lebias aymardi, H. E. Sauvage, Bull. Soc. Geol. Prance, [2] 
vol. xxvi. p. 1070, fig. no. 3. 
1874. Prolebias gregatus, H. E. Sauvage, Bull. Soc. Hist. Nat. Toulouse, 
vol. viii. p. 190 (said to be Pachystetus gregatus, Aymard MS.). 
Type. Imperfect fish. 
A very small species. Length of head with opercular apparatus 
exceeding the maximum depth of the trunk and contained about 
three and a half times in the length to the base of the caudal fin. 
Vertebrae 14 in the abdominal, 20 in the caudal region. Dorsal 
fin with 10 rays, arising behind the origin of the anal, which 
comprises 12 rays ; caudal fin truncated. 
Form. ^ Log. Upper Oligocene : Puy-en-Yelay, Prance. 
** 
P. 9218. Typical specimen 0-026 in length; Bonzon. 
Presented by the Bev. F. St. John ThacTceray , 1900. 
P. 8984. Smaller specimens, more imperfect, on similar slab of 
marl; Bonzon. Presented by Lady Prestwich, 1896. 
Prolebias stenoura, Sauvage. 
1874. Prolebias stenoura, H. E. Sauvage, Bull. Soc. Hist. Nat. Toulouse, 
vol. viii. p. 191, pi. i. figs. 4, 5. 
Type. Imperfect fish. 
A robust species attaining a length of about 0*06. Length of 
head with opercular apparatus slightly exceeding the maximum 
depth of the trunk and occupying about one third of the length to 
the base of the caudal fin. Vertebrae 12 to 14 in the abdominal, 
20 in the caudal region. Dorsal and anal fins exactly opposed, 
each with 15 rays ; caudal fin truncated. 
Form. ^ Log. Upper Oligocene : Puy-de-D6me, Prance. 
28491. Several typical specimens; Le Puy-de-Corent. Croizet Coll. 
P. 1832. Pive similar specimens ; labelled “ Clermont.’^ 
Egerton Coll. 
28426. Seven imperfect small specimens. 
Bravard Coll. 
