20 

 4. Parhomaloptera Vaillant. 



(VAILLANT, Notes Leyden Museum XXIV. 1902, p. 129). 



Differs from Homaloptera in the presence of 8 very short 

 and thick barbels, six in a horse-shoe shaped groove before 

 the mouthopening, the end of which is forked at both sides 

 in an outward direction. A very small barbel at the corner of 

 the mouth. Lower lip bifid, foliaceous. 



Distribution: The single species is known only from 

 rivers in Borneo. 



i. Parhomaloptera microstoma (Blgr.) 



Homaloptera microstoma Boulenger, Ann. & Mag. Nat. Hist. (7) IV. 1899, p. 228. 

 Parhomaloptera obscura Vaillant, Notes Leyden Mus. XXIV. 1902, p. 130. 

 Parhomaloptera obscura Popta, Notes Leyden Mus. XXVII. 1906, p. 187. 



D. I 2.7; A. I 2.5; P. 5 6.13; V. I.Q.I ; L. 1. about IOO; 



17 



L. tr. T. 



13 

 Height 6.2 7, 8 9 in length with caudal. Head much 



Fig. 5. Parhomaloptera microstoma (Blgr.) (After Vaillant). 



depressed 5 5.4, 6.2 6.6 in length with caudal, its breadth 

 about 4 / 5 of its length. Eye 5.5 6, situated in the posterior 



