163 
Upper jaw long as broad, 7 or 8 In lower jaw. 
D. 10 or 11, fourth ray strong, extended and 
expanded, reaches beyond hind end of fin; A. 11 or 12, in 
/ 
3 sections, first to fifth pigmented, sixth more than 
double third, greatly expanded medially, third section 
little longer than first or only 2/3 of median or 
second section (in small examples median section but 
r 
iittle longer than others); pectoral rays 10; ventral 
rays 6. ' 
Dark brown. Blackish pigment on back. Beak 
dark brown, in life end red. Fins clear. Dorsal 
membranes pigmented, other fins only with rays pigmented. 
Width of lateral streak on side of tail 1/5 to ^ depth 
of caudal peduncle. 
Length 190 mm. - (Mohr.) 
East Indies, Melanesia. 
Zenarchopterus beauforti MOHR, . 
Zenarchopterus beauforti MOHR, Zcol. JahrbUcher, 
Syst., vol. 52, p. 259, fig. 21 (fins), 1926 
(type locality: Muar River, Selangor, Malay 
Peninsula). 
