Fish of the Tai-Hn. 
OOBIONINAE. 
Pseudogobio rivularis (Basilewsky). 
Head 3;^ ; depth -[{ ; D. iii, 7, i ; A.. 11, 5, i ; scales 33 in lateral line to caudal 
base and 2 more on latter ; 6 scales above lateral line, 4 below ; 13 predorsal scales; 
snout 2f in head length ; eye 4I ; maxillary 4^ ; interorbital 3f ; head width if. 
Faded uniform brownish generally. Traces of 7 dark median lateral blotches, each 
about size of eye. Dorsal and caudal each with 6 transversely dusky lines. Small 
black spot at middle of caudal base less than pupil. One example, 68 mm. 
Pseudorasbora parva (Schlegel). 
Head 4^ ; depth 3I ; D. iii, 7, I ; A. Ill, 6, i ; scales 33 in lateral line to caudal 
base and 3 more on latter ; 5 scales above lateral line, 4 below ; 14 predorsal scales ; 
snout 3 in head measured from upper jaw tip ; eye 3f ; maxillary 3f ; interorbital 
2^; Head width if in its total length. Brownish generally. Edge of each scale in 
back and sides with vertical streak of darker. Median lateral gray streak from snout 
to caudal base medianly, broader and most distinct on side of caudal peduncle. 
Fins brown. One example, 107 mm. 
HYPOPHTHALMICHTHYINAE. 
Hypophthalmichthys molitrix (Valenciennes). 
Head 2| ; depth 3^; D. iii, 7, i ; A. iii, 13, i ; P. i, 13 ; V. i, 8 ; qo tubular scales 
in lateral line to caudal base and 8 more in latter ; 26 scales above lateral line, 17 
below to anal origin; 53 predorsal scales; snout 3j'in head measured from upper 
jaw tip ; e3^e 6f ; maxillary 3^ ; interorbital 2^. 
Body strongly compressed, deep, postventral little trenchant, otherwise edges 
all convexly rounded and greatest depth at ventral origin. Caudal peduncle well 
compressed, least depth if its length or 3^ in head. 
Head large, deep, strongly compressed, width 2^ its length ; upper profile slightly 
concave anteriorly and with upper jaw little protruded upward. Snout wide, 
convex, obtuse, length f its width. Eye subinferior, faces downwards, hind edge at 
first f in head length ; diameter 2^ in snout or 3 in interorbital. Mouth large, wide, 
rather shallow mandible slightly projecting when closed. Maxillary greatly inclined, 
reaches front nostril, largely covered by preorbital ; lower edge about level with 
lower pupil edge. Upper jaw edge firmly trenchant and mandibular edge broadly 
obtuse. Tongue free, pointed in front, wide. Nostrils together, superior close before 
upper front eye edge well above eye ; hind one more slit-like and larger. Inter- 
orbital convex. Preorbital about as long as eye ; other suborbitals all narrow. Opercle 
with many fine radiating striae. 
Gill-opening extends forward little less than half way in head, not to eye. Gill- 
rakers annectant, as fine reticulations, about 70 -|- 288 series ; length f of eye or f of 
gill-filaments. No pseudobranchiae. Isthmus narrow, slender, lower surface con- 
cave. 
Scales small, greatly crowded on back, breast and belly ; largest along lower 
