FISHES OF BORNEO, WITH DESCRIPTIONS OF FOUR 

 NEV/ SPECIES. 



By Alvin Sealb. 



{From the Section of Fisheries, Biological Laboratory, Bureau of Science, 

 Manila, P. I.) 



The following collection of fishes was secured by me at Sandakan, 

 British North Borneo, Pehniaiy 10 to 14, 1908. Of the one hundred 

 and seventeen species, ninetj'-one were common to Borneo and the Phil- 

 ippines. Twenty-six only were recorded from Borneo and not from the 

 Philippines. The method of measurement is the same as that used by 

 Jordan and Evermann.^ The color markings recorded are all from 

 specimens which have beeji two jeRvs in alcohol. 



Family CAECHAEIID/E. Sharks. 

 Charcharias borneensis Seale, sp. nov. Plate I. 



Head 4; depth .5.1; eye 6.50 in head; snout but slightly less than 

 interorbital ; middle of eye exactly midway between tip of snout and 

 second gill arch; no spicules; nostrils considerably nearer mouth than 

 to tip of snout; length of under jaw 1.60 in snout; width of mouth at 

 angle 1.25 in snout; five gill arches, the posterior ones above base of 

 pectorals. Teeth all oblique in two rows at least |-| on each side; all 

 with swollen bases; those of the upper jaw have one large sharp point 

 and three smaller points on the inner side, the longest about one-third 

 the size of the large point; these graduate in size, both the large and 

 small points are denticulate. Each tooth of the under jaw consists of 

 a single, smooth, sharp point on a swollen base. I was unable to detect 

 any denticulations on the lower teeth. (See Plate I, figs. 3 and 4). 



The origin of the ventral is located posteriorly to the pectorals by a 

 distance one-third greater than the eye, the fin being midway between the 

 tip of snout and the middle of the base of the second dorsal; height of 

 dorsal 1.50 in head, its base 1.75 in its height; origin of second dorsal 

 midway between tip of caudal and fourth gill opening; height of second 



'Bull. U. S. Nat. Mils., (1896), 47, pt. 1, ix. 



