302 
ACTINOPTEEYGII. 
Scales variable in size; lateral line extending along the middle of 
the side of the tail. 
Very numerous species existing in the freshwaters of the tempe¬ 
rate and tropical regions of the Old World. 
Barbus megacephalus, Giinther. 
1876. Barhus megacephalus, A. Giinther, Geol. Mag. [2] vol. hi. p. 437, 
pi. xviii. 
Type. Imperfect fish; British Museum. 
An imperfectly definable species, referred to this genus chiefly on 
account of the aspect of the head and the general resemblance of 
the fish to living Sumatran species. Length of head with opercular 
apparatus about two thirds that of the vertebral column. Total 
number of vertebrae about 41, 18 being caudal. Dorsal fin com¬ 
prising 3 simple and 9 divided rays, the third not thickened and 
not quite half as long as the head; anal fin with 3 simple and 
5 divided rays, very short, about two thirds as deep as the dorsal 
fin ; caudal fin deeply forked, its lower lobe about two thirds as long 
as the head. 
Form. Log. Freshwater Tertiary Formation: Padang, Sumatra. 
P. 9431. Type specimen 0-6 in length, described and figured by 
Gunther, loe. cit. 
Fresented hy Herr B. D. M. Yerheelc, 1876. 
The following specimens are provisionally referred to the existing 
Barhus vulgaris (Fleming, Brit. Animals, 1828, p. 185) of Northern 
and Central Europe :— 
P. 8740. Portions of two lower pharyngeal bones, described and 
figured as probably referable to Barhus vulgaris by 
E. T. Newton, Vert. Forest Bed (Mem. Geol. Surv. 1882), 
p. 124, pi. xviii. figs. 15, 16; Forest Bed Series (Upper 
Freshwater Bed), West Bunton, Norfolk. Bavin Coll. 
P. 8719. Imperfect similar pharyngeal and six teeth ; WestEunton. 
Bavin Coll. 
The following supposed extinct species are not represented in the 
Collection:— 
Barhus fossilis, K. Martin, Samml. Geol. Eeichsmus. Leiden, 
[1] vol. hi. (1883), p. 20, pi. i. fig. 7.—Tertiary; Nang- 
gung, Java. [Imperfect fish ; State Museum, Leyden.] 
Barhus steinheimensis, F. A. Quenstedt, Handb. Petrefakt. (1852), 
