HYPSELEOTRIS 37 



case of Rhyacichthys aspro, already mentioned. His specimens 

 probably came from the hills east of Santa Cruz, at the upper 

 end of Laguna de Bay. 



I received a fine specimen, 71 millimeters long, from Alabat 

 Island, and another, 118 millimeters long, from Cajulogan barrio, 

 Gingog, Misamis Province, Mindanao. 



Genus 5. HYPSELEOTRIS Gill 



Hypseleotris GILL, Proc. Acad. Nat. Sci. Phila. 15 (1863) 270. 



These are fresh-water eleotrids, with the appearance and 

 habits of some cyprinid fishes, as Fim&vlus, They do not lie 

 on the bottom or attach themselves to objects as do most gobies 

 and eleotrids, but swim freely in the water. 



The body oblong, rather short, laterally very much com- 

 pressed ; the head likewise laterally compressed, pointed, higher 

 than wide, its sides scaled, and without bony crests above; the 

 mouth oblique, with short jaws, the lower one prominent; the 

 slender awl-shaped teeth in several rows in each jaw, subequal, 

 without canines; the scales large, 23 to 32 in a lateral series; 

 the dorsals well separated, rather low; the caudal obtuse. Dor- 

 sal VI, 1-8 to 11 ; anal I, 9 to 11. 



The anal papilla is characteristic of the genus, more or less 

 oblong or square, with notched or bilobed tip, often very large, 

 and in some species with revolute edges. 



The genus occurs from the East Indies to Australia and the 

 tropical islands of the South Pacific. 



Key to the Philippine species of Hypseleotris. 



a 1 . Two brown stripes crossing cheek from eye to operculum; anal papilla 



small H. agilis. 



a*. No brown stripes on cheek. 



6 1 . Color uniform tawny; a blackish spot on upper pectoral base; anal 



papilla large, notched H. cyprinoides. 



b*. Color brown to gray; a dark crossbar on base of pectoral. 

 c 1 . No black median lateral line. 



d 1 . Caudal clear to golden; dorsals clear in females; males with first 

 dorsal spotted with black; second dorsal deep black with 

 circular white spots; anal papilla with a lunate bilobed tip. 



H. bipartita. 



tP. Caudal crossbarred with brown or black; a large black spot on 

 lower half of caudal base; both dorsals crossbarred by rows of 

 pale and dusky spots; anal papilla small, slender, minutely 



notched H. modestus. 



c*. A blackish median lateral line; anal papilla very broad, long, 

 notched; first dorsal pale basally, remainder black; second dorsal 

 crossbarred pale and black H. pangel. 



