FISHES OF BORNEO. 267 



Family BELONIDJ]}. Needlefishes. 

 Tylosurus strongylurus (Kuhl and Van Hasselt). 



Head 2.60 ; eye 3 in postocular portion of head ; origin of ventials 

 midway between origin of pectorals and middle of base of anal. Nos. 

 3538 and 2696 ; length, 250 millimeters. ' 



This species is easily distinguished by the round black spot on the 

 base of the rays of caudal. 



A food-fish of Borneo; also recorded from' the Philippines. 

 Tylosurus anulatus (Cuv. and Val.). 



Head 3; eye 2 in postorbital portion of head; origin of ventrals 

 midway between end of caudal vertebra and anterior margin of eye. 



Color silvery, washed with brownish above; pectorals, dorsal, caudal, 

 and anterior- part of anal, dusky. Nos. 2667 and 2718; length, 290 to 

 300 millimeters. 



A food-fish of Borneo ; also recorded from the Philippines. 



Family EXOCCETIDiE. Half-beaks and Flying-fishes. 

 Zenarchopterus buffonis Cuv. and Val. 



Head -I; depth G; eye 1.50 in postorbital portion of head; snout 2 in 

 head; interorbital space considerably greater than eye; dorsal 11; anal 

 12; origin of ventrals midway between tip of caudal and the posterior 

 margin of opercle. Prolonged portion of under jaw beyond the upper 

 3.75 in head. Length from posterior niai'gin of opercle to tip of under 

 jaw much less than from posterior margin of opercle to end of caudal 

 vertebra. ISTos. 2622, 2672, and 2699; length, 170 to 215 millimeters.. 



A small brackish-water fish, dried and sold for food in considerable 

 numbers in Borneo ; also recorded from the Philippines. 

 Hemirhamphus gaimardi (Cuv. and Val.). 



Head 4.25; depth 1.75 in head; exposed under jaw, beyond the upper, 

 1.75 in head; ventrals located midway between end of caudal vertebra 

 and anterior margin of eye; dorsal 15; anal 15; origin of dorsal very 

 slightly in advance of origin of anal; caudal forked. 



Color silvery, bluish above; a blue and a silver line along the side; tip 

 of dorsal and posterior portion of caudal dusky. ISTos. 2473, 2640, 2664 

 and 2666 ; length, 145 to 195 millimeters. 



A food-fish of Borneo; also recorded from the Philippines. 

 Zenarchopterus dux Seale, sp. nov. Plate II, fig. 2. 



Head, from tip of upper jaw, 4 to end of caudal vertebra; lower jaw, 

 beyond the upper, 3 to end of vertebra; posterior margin of opercle 

 midway between tip of lower jaw and end of caudal vertebra; dorsal 12; 

 anal 14, the 6th ray modified into an intromittent organ ; scales in lateral 

 series 41, about 45 in lateral line, 6 in vertical series; eye 3.75 in head; 



