BUTIS 51 



Many individuals are much darker in life than is the one 

 described from Pasig River, the general color being very dark 

 purplish brown, almost black. The margins of the soft dorsal 

 and anal and the upper and lower margins of the caudal are 

 also yellow in some specimens. 



In the Bureau of Science collection is also a specimen from 

 India determined by the eminent authority on Indian fishes, 

 Dr. Francis Day. This agrees with Philippine specimens in 

 every respect except the size of the mouth. Day says, "The 

 maxilla reaches to below the middle of the eye," with which 

 statement his specimen agrees perfectly. 



This species has been recorded previously from the "Phil- 

 ippine Islands;" Manila, Cavite, and Bacon, Sorsogon, Luzon; 

 Iloilo, Panay; Negros, Cuyo, and Palawan. It occurs from the 

 coast of Bengal eastward throughout the Indo-Australian Ar- 

 chipelago as far as New Guinea. 



16. BUTIS GYMNOPOMUS Bleeker 



Eleotris gymnopomus BLEEKER, Nat. Tijd. Ned. Ind. 4 (1853) 274. 

 Butis gymnopomus BLEEKER, Nat. Tijd. Ned. Ind. 12 (1856) 215 



(name only) ; Rev. Especes Eleotriformes, Versl. Akad. Amsterdam 



11 (1877) 76. 



Dorsal VI, 1-8 or 9 ; anal I, 8 or 9 ; there are 26 to 28 scales 

 in a longitudinal series and 10 in a transverse series ; there are 14 

 scales between the first dorsal and the interorbital space; sec- 

 ondary scales are lacking. 



The body elongate with arched dorsal profile, cylindrical an- 

 teriorly, and much compressed laterally on the posterior half; 

 the depth greatest at first dorsal, 4.75 to 5 times in the 

 length; the long head much depressed and 2.8 times in the 

 length; the broad rounded snout 2.7 to 2.8 times in the head; 

 the eyes contained 1.8 times in snout; the interorbital space 

 varies from a little more to a little less than an eye diameter; 

 mouth large, oblique, with projecting lower jaw, the maxillary 

 extending to or beneath anterior margin of eye; the teeth of 

 outer row in each jaw noticeably larger and more widely spaced 

 than the rest; nostrils as in B. a/mboinensis ; the orbital and 

 preorbital ridges very low, smooth, and inconspicuous ; the head 

 naked except on opercles and nape, with no interocular scales; 

 the rest of body scaled as in B. amboinensis ; the least depth 

 of caudal peduncle from 2.25 to 2.6 times in its length; the 

 ventrals about as long as the distance to the rather large 

 lanceolate genital papilla; the pectorals are much larger and 

 extend to the genital papilla or even to the anal fin; the soft 



