1905.] NATURAL SCIENCES OF PHILADELPHIA. 493 



tail they form posteriorly into several broad indistinctly defined trans- 

 verse bars. Rayed dorsal, anal and caudal with whitish margins, 

 adjoining which is a blackish submarginal shade becoming diffuse 

 toward middle of fins. Bases of these fins pale variegated with fine 

 broAvnish mottlings on former and large whitish obliquely inclined for- 

 ward blotches on anal. Caudal more or less finely barred, less distinctly 

 so basally. Pectoral with many fine wavy transverse bars. A deep 

 brown streak along side of snout to eye and continued behind latter 

 to edge of preopercle. A number of variable brownish bars on side and 

 under surface of head. Iris slaty. 



TiCngth 6 inches. 



Type No. 14,150, W. I. A. P. Borneo. 1898. Dr. W. H. Furness. 

 One example. 



This species is evidently closely related to Mastacembelus guentheri 

 Day*^ which has been recorded from Borneo by Prof. Vaillant.*^ The 

 Indian fish appears to differ somewhat in coloration according to Day's 

 account, especially as there is no black bar at the base of the caudal. 

 His figure^^ fails to indicate this. Margins of the vertical fins of Masta- 

 cembelus vaillanti well edged with white, the color pattern different, pre- 

 senting a beautiful blotched or spotted appearance, and the pectorals 

 finely barred. 



(Named for Prof. Leon Vaillant.) 



MASTACOBMBELIDiE. 

 48, Tylosurus leiuroides (Bleeker). 



Depth in trunk, without head, about 11; D. iii, 16; A. iir, 22; eye 

 3f in postocular region of head; interorbital space 2h; least depth 

 of caudal peduncle 3*. One example, 12^ inches (jaws and caudal 

 damaged). 



HEMIRAMPHID,^. 

 HEMIRAMPHIN.E. 

 Mandible produced far beyond upper jaw in a long slender beak or 

 point. 



LABIDORHAMPHUS subgen. nov. 

 Type Hemirhamphus amblyiirus Bleeker. 

 Upper jaw twice as long as broad. 

 (/la/Jif, pincers; pd;xyo<}j beak.) 



*'' Proc. Zool. Soc. Lond., 1865, p. 37. In paddv-fields and the Trichoor back- 

 water [Cochin, on the Malabar or western coast of India]. 



« Nouv. Arch. Mus. Paris, V (.3), 1893, p. 106. Kina-Balou. (M. Whitehead ) 

 « Fishes of India, II, 1876, PI. 73 fig. 2. 



