38 

 2. Vaillantella maassi M. Web. & de Bfrt. 



\aillantella maassi Max Weber & de Beaufort, in: A. Maass n Durch Zentral 

 Sumatra" II. 1912, Fische p. 532. 



D. 73; A. 15; P. 10; V. 8. 



Elongate, compressed; height 11, 14 in length with caudal; 

 head 6 2 / 3 , 8 in length with caudal. Eye 8, 2 2 / 5 in snout 

 and i 1 ^ in interorbital space. Snout prominent, round, in 

 middle of its top a pair of short rostral barbels, about equal 

 to eye, above and slightly outside of them a second somewhat 

 longer pair, a third pair of barbels at the corner of the mouth, 

 longer than half snout. Posterior nostrils oval, anterior nostrils 

 a voluminous tubule, contiguous with the former. Origin of 



Fig. 1 8. Vaillanteha maassi M. Web. & de Bfrt. nat. size. 



dorsal before the beginning of the second third of the length of 

 the body, much nearer to base of pectorals than to that of 

 ventrals; last dorsal ray nearly reaches caudal. Anal twice as 

 near to caudal than to ventrals. Ventrals equal to pectorals, 

 reaching anus, which is situated nearly in the middle of the 

 length of the body. Pectorals i ! / a in length of postorbital 

 part of head. Caudal deeply forked, lobes pointed, upper lobe 

 one third longer than lower one, I ! / 2 times length of head. Cycloid 

 scales very small, lateral line conspicuous. Uniform brown. 

 Length of single specimen known 98 mm. [Type of the species 

 in the Zoological Museum of Amsterdam]. 



Habitat: Sumatra (Gunung Sahilan on river Kampar kiri !). 



8. Nemachilus Bleeker. 



(BLEEKER, Versl. Akad. Amsterdam, Dec. 1862, XV. 1863, p. 37) '). 



Elongate, feebly compressed. Eyes with a free orbital margin ; 

 no suborbital spine. Head rounded, with blunt short snout; mouth 

 small, inferior with a circular lip. Six barbels: a pair of rostral 

 ones close together on the top of the snout, two pairs on the 



i) The generic name Nemachilus is from VAN HASSELT (Alg. Konst- & Letter- 

 bode II. 1823, p. 133) but without description. 



