CYMilN’IIO'. 
303 
p. 236, pi. xix. figs. 1, 2. — Middle Miocene; Steinheim, 
Wiirtemberg. [Imperfect fish ; Geological Museum, 
University of Tubingen.] 
Genus THYNNICHTHYS, Blocker. 
[Natuurk. 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 wedgod into each 
ofc her. Barbels and pseudobranchi® absent. Dorsal fin in middle 
°f 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 March). 
1876. Sarclinioiies amblyostoma, W. von der Marck, Palaeontogr. 
vol. xxii. p. 409, pi. xxiv. fig. 1. 
1876. Thynnichthys amblyostoma, A. Gunther, Geol. Mag. [2] vol. iii. 
p. 436, pi. xvii. 
Fype. Imperfect fish ; Royal 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 30 vertebrae, 15 or 16 ol t.heso 
being caudal. Dorsal fin comprising 3 simple and 9 divided rays, 
fhe 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. $ Lac. Freshwater Tertiary Formation : Padang, Sumatra. 
47515-17. Three specimens described by Giinther, loc. cit., and 
used in the composite figure, pi. xvu. 
Presented by 11 err P. D. M. T erbeek , 1876. 
47518—25. Eight specimens, some rather small. 
Presented by Herr E. D. M. Verbeelc, 1876. 
Genus GOBIO, Cuvier. 
[Rogue Animal, vol. ii. 181/, p. 193.] 
Mouth inferior, with a pair of barbels at the angle. Pharj ngeal 
teeth uncinate, in single or double series. Pseudobranchi® present. 
