155 

 Artificial key to the indo-australian species. 



I. Barbels fringed. (Subgenus Oxybarbus] C. heteronema p. 156. 



II. Barbels, 'nf present, not fringed. 



A. No barbels (Subgenus Anematichthys}. 



1. Height less than three, scales generally with a 



dark basal spot, dark spot at base of caudal. C. apogon p. 156. 



2. Height more than three, a narrow blackish band 

 along lateral line, dorsal and caudal with 



blackish margins C. janthochir p. 157. 



B. Two or four barbels. (Subgenus Cyclocheilichthys 

 s. str.). 



1. End of tubes on scales of lateral line bifid . . C. enoplos p. 158. 



2. End of tubes on scales of lateral line simple. 

 a. 4 barbels. 



1) Eye 4 or more, 1.5 or more in postorbital 

 part of head. Pectorals not reaching 



ventrals C. de Zwaani p. 159. 



2) Eye less than 4, equal to or V 3 shorter 

 than postorbital part of head. Pectorals 

 reaching ventrals. 



a. Origin of dorsal in the middle of a 



line connecting snout and end of shortest 



caudal rays. Least height of caudal 



peduncle twice in length of head, sur- 

 rounded by 20 scales ; 4 scales between 



ventrals and L. 1 C. repasson p. 160. 



ft. Origin of dorsal in the middle of a 



line connecting snout and base of caudal. 



Least height of caudal peduncle more 



than twice in head, surrounded by 16 



scales; ^/ 2 scales between ventrals 



and L. 1. . . C. lineatus p. 162. 



b. A pair of maxillary barbels only; there may be 

 in one case a pair of rudimentary rostral ones. 



1) 5Ya scales below lateral line; P. 1.12; 



L. 1. 34 C. deventeri p. 162. 



2) 6y 2 scales below lateral line; P. 1.15 18; 

 L. 1. 3537- 



a. Least height of caudal peduncle less 



than twice in head ; P. reaching ventrals. C. armatus p. 163. 

 /3. Least height of caudal peduncle more 



than twice in head; P. not reaching 



ventrals C. siaja p. 165. 



(C. megalops p. 166). 



