CTPRINID^. 
303 
p. 236, pi. xix. figs. 1, 2.—Middle Miocene; Steinheim, 
Wiirtemberg. [Imperfect fish ; Geological Museum, 
University of Tiibingen.] 
Genus THYNNICHTHYS, Bleeker. 
[Natiiurk. Tijdschr. Nederl. Ind. vol. xx. 1860, p. 433.] 
Head relatively large, and eye in the middle of the depth of the 
head; mouth anterior and lateral. Pharyngeal teeth lamelliform, 
with flat oblong crown, in three series which are wedged into each 
other. Barbels and pseudobranchiae absent. Dorsal fin in middle 
of back, with not more than 9 divided rays and no bony spine ; anal 
fin short. Scales small; lateral line extending along the middle of 
the side of the tail. 
Existing in the freshwaters of the East Indian Archipelago 
and Pegu. 
Thynnichthys amblyostoma (W. von der Marck). 
1876. Sardinioides amblyostoma, W. von der Marck, Palaeontogr. 
vol. xxii. p. 409, pi. xxiv. fig. 1. 
1876. Thynnichthys amblyostoma, A. Giinther, Geol. Mag. [2] vol. iii. 
p. 436, pi. xvii. 
Type. Imperfect fish ; Boyal Geological Museum, Dresden. 
A species attaining a length of about 0’3. Length of head with 
opercular apparatus considerably exceeding half that of the vertebral 
column, which comprises about 36 vertebrae, 15 or 16 of these 
being caudal. Dorsal fin comprising 3 simple and 9 divided rays, 
the third and fourth being longest, about two thirds as long as the 
head; anal fin very short, with 3 simple and 5 divided rays, about 
two thirds as deep as the dorsal fin ; caudal fin deeply forked, the 
length of the upper lobe not much less than that of the head. 
Form. ^ Log. Freshwater Tertiary Eormation : Padang, Sumatra. 
^ . 
47515-17. Three specimens described by Giinther, loc. cit., and 
used in the composite figure, pi. xvii. 
Presented by Herr R. D. M, Ferbeek, 1876. 
47518-25. Eight specimens, some rather small. 
Presented by Herr R. D. M. Yerbeek, 1876. 
Genus GOBIO, Cuvier. 
[Begne Animal, vol. ii. 1817, p. 193.] 
Mouth inferior, with a pair of barbels at the angle. Pharyngeal 
teeth uncinate, in single or double series. Pseudobranchiae present. 
