FRESH-WATER FISHES OF SIAM, OR THAILAND 307 



NOEMACHEILUS THAI Fowler 



Nemacheihis thai Fowleb, 1934a, p. 104, fig. 56 (Bua Yai, Chiengmai) ; 1937, 

 p. 156 (Mepoon). 



This species, described from a speciraen, 4.6 cm. long from Bua Yai 

 in Eastern Thailand, is reported also from Northern and Central 

 Thailand, the largest examples being 5.9 cm. long. The body is marked 

 by seven wide dark brown cross bands, two predorsal, two wholly or 

 partly subdorsal, and three postdorsal, together with a narrow black 

 vertical stripe at the caudal base. The dorsal rays have a median 

 dark spot and the caudal has several indistinct transverse rows of dark 

 spots. 



N, thai is very similar to N. nicholsi in form and in the number and 

 position of the cross bands and in the dark blotching or marbling of 

 top of head. Minor differences are seen in the marking on caudal, 

 anal, and ventral fins. The lateral line is described as complete, while 

 in N. nicholsi it is deficient posteriorly. 



NOEMACHEILUS MYRMEKIA Fowler 



Nemacheilus myrmekia Fowler, 1935a, p. 106, fig. 32 (Keng Sok). 



This species is known from one specimen, 5.8 cm. long. There are 

 nine dark brown cross bands, of which three are predorsal, three wholly 

 or partly subdorsal, and three postdorsal. If the species is distinct 

 from N. desmotes, the differences may be in the shorter rostral barbels, 

 the dark brown spots on top of head, the additional rows of spots on 

 dorsal ray, and the spotted lower fins. A preorbital "wart-like flap or 

 spine" possessed by the type is probably not of specific significance 

 but is a secondary sexual character borne by various species of 

 Noemacheilud. 



NOEMACHEILUS DESMOTES Fowler 



Nemacheilus desmotes Fowlee, 1934a, p. 107, fig. 59 (Chiengmai) ; 1937, p. 156, 

 figs. 8&-95 (Mepoon). 



This species was described from a specimen 2.8 cm. long, with a para- 

 type 2.4 cm. long. Later 10 specimens 2.8 to 5.2 cm. long were recorded 

 from Mepoon, and figures of 8 of these were published. The type 

 showed 8 dark cross bands posterior to the head, excluding a black bar 

 on the base of the caudal fin, the bands broad, with regular sides and 

 wider than the interspaces, 2 predorsal, 3 wholly or partly subdorsal, 

 and three postdorsal. The series of figures exhibits considerable de- 

 parture from the type as regards the cross bands, which are irregular 

 in shape, position, and number ; thus, 3 of the 8 figures show 9 complete 

 or incomplete bands, and 5 of them have 3 predorsal bands. 



