357 



caudal peduncle more or less than twice in head at base of 

 caudal. Colour of alcohol specimens uniform reddish brown 

 or the back darker; scales more or less with dark edges. A 

 dark longitudinal band through the eye, which may increase 

 on operculum, so as to colour it and the branchial membrane 

 deep dark brown; membrane of fins dusky or blackish as also 

 a crossbar on pectorals near their base. Length 82 mm. [Type 

 in the British Museum seen by us]. 



Habitat: Island Singkep!; Sumatra (Upper Langkat!). - 

 Malay Peninsula (Perak !). 



4. Betta akarensis Regan. 



Betta akarensis Tate Regan, Proc. Zool. Soc. London 1909, p. 779. 



D.8; A. 1.27; P. 13; V. 1.5; L.I. 31. 



Rostro-dorsal profile slightly convex. Height 3.5, head 3 in 

 length. Eye 3.2 in head; its diameter longer than snout, 1.7 

 in postorbital part of head and about equal to interorbital 

 space, which goes 3.2 times in head. Maxillary extending to 

 below posterior nostril. Origin of dorsal midway between head 

 and base of caudal, separated by about 30 praedorsal scales 

 from snout and opposite to i6th or 17^ lateral scale. Base of 

 anal with a sheath of one row of scales. Pectorals somewhat 

 longer than head without snout. Height of caudal peduncle 

 1.8 in length of head and equal to length of its postorbital 

 part. Brownish, with darker stripes along the series of scales; 

 a dark longitudinal band on the head, passing through the 

 eye; fins dusky. Length of single specimen known 52 mm. 

 [Type of the species in the British Museum seen by us]. 



Habitat: Borneo (Sarawak, river Akar!). 



5. Betta anabatoides (Fig. 92, p. 353). 



Betta anabatoides Bleeker, Nat. Tijdschr. Ned. Indie I. 1850, p. 269. 



Betta picta Bleeker, Atl. ichth. IX, 1877, tab - CCCXCV. Osphrom. tab. I, fig. 3. 



Verb. Akad. Amsterdam XIX. 1879, Poiss. pharyng. labyrinth, p. 26. 

 1 Betta pugnax Volz, Zool. Jahrb. Abt. Syst. XIX. 1903, p. 373. 

 * Betta pugnax Fowler, Proc. Acad. Nat. Sci. Philad. (2) LVII. 1905, p. 504. 

 Betta anabatoides Tate Regan, Proc. Zool. Soc. London 1909, p. 780. 

 Betta Bleekeri Tate Regan, 1. c. 



D.8 10; A. II. 25 30; P. 13; V.I. 5;L.l. 31 34;L.tr. io'/ 2 . 



Rostro-dorsal profile more or less straight from dorsal to 



nape, from there to snout slightly declivous. Height with in- 



