CARCHABINUS. 12") 



Second dorsal about equal the anal, origins opposed 

 snout obtusely pointed 



teeth serrated more coarsely toward the base, upper broader 



pectorals § as wide as long . . . menisorrah (page 135) 

 snout elongate, moderately pointed 



teeth serrated, upper subtriangular, lower like those of Scoliodon 



pectorals broad ..... acronotus (page 136) 

 snout somewhat produced 



teeth serrated, upper oblique, notched, lower narrow more erect 



pectorals twice as long as wide . . spallanzanii (page 130) 

 snout moderate, bluntly rounded 



teeth serrated, upper oblique, notched, lower smaller, more erect 



pectorals less than twice as long as broad dussumieri (page 137) 

 snout rather produced and pointed 



teeth broad-based, upper serrated, lower narrower smooth 



pleurotaenia (page 137) 

 Second dorsal origin backward of that of the anal 

 snout narrowly rounded in front 



teeth oblique, upper with 2-3 denticles on outward end of base; lower 



smooth borneensis (page 138) 



snout rather abruptly narrowed in front of eyes 



teeth serrated, broad-based, nearly erect, lower cusps narrower 



remotus (page 138) 

 Second dorsal larger than the anal, origin farther forward 

 snout very short, nostrils near the end 

 upper teeth broad, serrated 



pectoral long, shorter than in C. eommersonii 



gangeticus (page 139) 

 snout moderate 



upper teeth broad, triangular, serrated 



pectorals long, moderately broad . eommersonii (page 140) 

 pectorals long, narrow . . . albimarginatus (page 141) 

 snout short, blunt; teeth serrated 



upper teeth broad, triangular, lower narrow, chisel-shaped 

 pectorals large, more than half as wide as long 



glyphis I page 141) 



