352 



Doubtful species. 

 2. Ctenops nobilis Mc Clell. 



Ctenops nobilis Mc Clelland, Calcutta Journ. Nat. Hist. V. 1844, p. 281. 

 Osphi-omemis nobilis Day, Proc. Zool. Soc. London 1869, p. 519. 

 Osphroinenus nobilis Day, Fish. India 4°. 1878 — 1888, p. 372. 

 Osphromenns nobilis Vaillant, Nouv. Arch. Mus. Hi.st. nat. Paris (4) V. 1893, p. 102. 

 Ctenops nobilis Regan, Proc. Zool. Soc. London, 1909, p. 777. 



D. V— VII.7— 8i A. IV— V.24— 28; P. 12; V.I. 5; L.l. 29— 33; 

 L.tr. A, 



12 



Height 2'/3 to 3 in length without caudal; head acute, rather 

 depressed, considerably shorter. Diameter of eye 3'/., in 

 head, shorter than snout. End of intermaxillaries opposite 

 to frontborder of orbit. Dorsal and anal spines rather strong, 

 soft dorsal, anal and caudal not produced, rounded. Ventral 

 filament prolonged in some specimens but not longer than 

 head. Lateral line, when present, in the form of a simple orifice 

 in the centre of each scale; occasionally it becomes more tubular 

 toward the caudal region. Brownish, with darker stripes along 

 the series of scales and with scattered blackish spots; a silvery 

 white stripe, more or less interrupted, from eye to base of 

 caudal; below it two similar stripes or series of oblong spots; 

 fins with small dark spots; an ocellus on the upper part of 

 the base of the caudal. Length at least up to 100 mm. 



Habitat: r Borneo (river Sebruang) [Vaillant]. — Rivers 

 of N. E. Bengal and Assam. 



Note: Vaillant (I.e.) who described 6 young specimens 

 of 31 mm. length is not sure about his definition. We doubt 

 its correctness, as he found the fin-formulife D. VIL 7; A. XL 18, 

 thus quite different from the anal of Ct. nobilis, though the 

 total number of spines and rays is about equal. Aii other 

 difference in his description 'are "une dizaine de raies tfans- 

 versales zebrent le corps, elles sont surtout distinctes dans 

 leur moitie inferieure". 



10. Betta Bleeker. 



(Bi.EEKER, Verh. Pat. Genootsch. XXIII. 1850, Vissch. Doolhofv. 



Kieuw. p. 12). 



Paropliioccphalus Popta, Notes Leyden Mus. XXV. 1905, p. 184 



and ibid. XXVI. 1906, p. 9 (p.p.)- 



More or less compressed, elongate. Mouth protractile, its 



