292 
ACXIN OPTEK Y GII. 
42800. Two minute specimens on one slab. 
Van 
Breda Coll- 
42801. Distorted fish the anterior portion vertically crushed. 
— , Breda toll" 
Van ■ 
Prolebias gregatus, Sauvage. 
1869. Lebias aymardi, II. E. Sauvage, Bull. Soc. G6ol. France, [' 
vo1 - x xvi. p. 1070, fig. no. 3. r| , , use , 
1874. Prolebias gregatus, H. E. Sauvage, Bull. Soc. Hist. Nat. '** 
vol. viii. p. 190 (said to be Fachystetus gregatus, Ayniar 
Type. Imperfect fish. atnS 
A very small species. Length of head with opercular appa ^ 
exceeding the maximum dcptti of the trunk and contains a ^ 
three and a half times in the length to the base of the cau gg j 
Vertebra} 14 in the abdominal, 20 in tho caudal region. 
fin with 10 rays, arising behind the origin of the anal, ft 
comprises 12 rays ; caudal fin truncated. 
Form. Sf Loc. Upper Oligocene : Puy-en-V clay, France. 
P- 9218. Typical specimen 0-026 in length ; Itonzon. 19 OO. 
Presented by the Rev. F. St. John Thackeraj, 
P- 8G84. Smaller specimens, more imperfect, on 
marl ; Itonzon. 
u similar Sl fg 9 f 
Presented by Lady Prestunch, 
_ IoulOU se > 
Prolebias stenoura, Sauvage 
1874. Prolebias stenoura, II. E. Sauvage, Bull. Soc. Hist. T^at 
vol. viii. p. 191, pi. i. figs. 4, 5. 
Type. Imperfect fish. t T c ngthof 
A robust species attaining a length of about 0-06. '' 
head with opercular apparatus slightly exceeding tho ia ] ^ to 
depth of the truuk and occupying about one third of t 0 ^inah 
the base of the caudal fin. Vertebrae 12 to 14 in the a < e d, 
20 in the caudal region. Dorsal and anal fins exact y 
each with 15 rays ; caudal fin truncated. 
Form, df Loc. Upper Oligocene : Puy-de-Ddme, France. 
. r ro izet Cod- 
28491. Several typical specimens ; Le Puy-de-Coren . 
P. 1832. Five similar specimens ; labelled “ Clermont. 
umiuard Coll 
28496. Seven imperfect small specimens 
Coll- 
Bravar 
