NEW SPECIES OP PHILIPPINE FISHES. 581 



of fish; ventrals 5, the first ray filiform, extending to caudal, the othei 

 rays veiy small, almost atrophied. Maxillary short, slightly less than 

 diameter of eye; interorbital space 2.50 in head. 



■ ''^ndy oblong, compressed, the head is pointed, the profile from nuchal 

 j'egion to tip of snout is very slightly concave. Depth of caudal peduncle 

 2\35 in liinid. 



The interorbital space is slightly convex, the mouth is small and di- 

 rected upward, the lower jaw strongly projecting; width of preorbital is 

 two-thirds of eye, it has a strong notch which receives the tip of the 

 maxillary, lower margins of preorbital provided with about 8 distinct 

 teeth. Jaws with bands of small sharp teeth including several enlarged 

 canines, the latter being curved and more or less projecting; no teeth 

 on vomer or |)alatine. The posterior margin of preopercle is entire, 

 but its lower linib is margined by a row of long shai-p teeth. Opercle 

 without spine, ending in a sharji membranous flap. Three rows of 

 scales on opereles and four on cheeks. Gill openings united on isthmus. 

 Gill rakers numerous, short, flat, sharp-pointed. 



Entire body including head covered with fine ctenoid scales, scales 

 largest on opereles, soft dorsal with large scales on base, caudal and anal 

 scaled, throat scaled. 



Origin of dorsal is midway between pupil and end of last vertebra, the 

 spines graduate in size, the last one the longest, about 2.1, the rays in 

 male specimens elongate, greater than length of head, caudal slightly 

 inclined to be bilobed, its length slightly greater than head. Spinous 

 anal fitting into a scaly sheath, origin of its first spine midway between 

 tip of upper jaw and ninth anal ray, the spinous portion contained about 

 twice in soft posterior portion^ the longest spine about 3 in head, the 

 longest ray 1.35. Origin of ventrals in advance of pectorals, their 

 anterior ray I'eaching to, or almost to, base of caudal. Pectorals about 

 equal to length of head. 



Color in life brown with some irregular blackish marks on shoulders, 

 some yellowish on opereles and on thorax, some vivid pink at base of 

 anal, extending almost length of base. Dorsal, yellowish brown in fe- 

 males, brown in males, the rays marked with yellowish dark-ringed spots. 

 Caudal brown with numerous yellowish spots, anal brown with some 

 yellowish spots, pectorals brown, ventrals yellowish, a distinct black spot 

 at base of caudal, another on middle of side. 



Color in alcohol similar to above but yellow much faded, and the pink 

 at base of anal disappears. 



Type is ISTo. 4951 from lake on Cagayan-Sulu Island, Suhi Sea. 

 Length, 73 millimeters. Numerous cotypes. 



It is rather interesting to find this form in a crater lake on this 

 volcanic island, isolated as it is in the Sulu Sea. 



