650 Records of the Indian Museum. [Vol. XXII, 



d. Proboscis present on snout forming^ a distinct 



median knob ; no groove marking off tip of snout G, lamta r^ , Ham. 



Ruch. 

 d' . Proboscis absent or represented by a raised 

 area between the nostrils. 

 e- Tubercles on snout usually present ; two short 



lateral grooves marking oft' tip of snout ... G. itiiillva (S\kes). 



e'. Tubercles if present few ; no grooves on 

 snout (snout smooth). 



/. .\nlerior origm of dorsal equidistant from 

 tip of snout and base of caudal. 

 g. Scales present in post-pelvic region and 



on dorsal surface in front of dorsal ... G. lissorhynclitis (Mc- 



Clell.). 

 g'. Scales absent in post-pelvic region and 



on dorsal surface in front of dorsal .. G. abhoyai. sp. no\'. 

 /"'. Anterior origin of dorsal not equidistant 

 from tip of snout and base of caudal. 

 g. Ventrals distinctl)' reaching beyond anal 

 opening. 

 /;. Anus situated almost midway between 



anterior origins of anal and ventral fins G. keinpi, sp. nov. 



/;'. Anus not situated midway between 



anterior origins of anal and ventral fins. 



/. Distance between anus and anterior 



origin of anal fin greater than 1/3 



distance between anterior origins of 



anal and ventral fins .. ... G. >iaganeitsis.^\>. now 



j' . Distance between anus and anterior 

 origin of anal fin less than 1/3 dis- 

 tance between anterior origins of 

 anal and ventral fins ... ... G. prastiadi. sp. nov. 



g' . Ventrals almost reaching or not reach- 

 ing the anal opening ... ... G.gravelyi, 2 (Annan- 

 dale). 

 c'. Pupil of eye almost in middle of head or nearer 

 tip of snout than posterior border of operculum. 

 d. Belly and dorsal surface in front of dorsal fin 



naked ... .. ... ., G. /Ofi/cfO" ( Nikolski ). 



d', Belly and dorsal surface in front of dorsal fin 

 not naked. 



e. Anterior origin of dorsal almost equidistant 

 from tip of snout and base of caudal. 

 /. .Maxillary barbels shorter than diameter 

 of eye. 

 g- Diameter of eye contained yg times in 



length of head .. ... ... [G. sp.] 



g' . Diameter of eye contained 4:4 times in 



length of head ... ... ... G. not at a (BIyth). 



/'. Maxillary barbels longer than diameter of 



eye ... ... ... ... G. rliaiidliiii-ii, ip. nnv. 



e . .\nterior origin of dorsal not equidistant from 

 tip of snout and base of caudal. 

 f. Anterior origin of dorsal nearer tip of snout 

 than base of caudal 



g. Mental disc absent or rudimentary ... [G. adiscns (Annan- 

 dale).] 

 g' . Mental disc present. 



/;. .Anterior origin of ventrals distinctly 



nearer base of caudal than tip of snout. 



]. .\nterior origin of anal_ nearer base 



of caudal than anterior origin of 



ventrals ... ... ... G. lamta. 9 Ham. 



Buch. 



