SICYOPTERUS 311 



head; the ventrals broader than long, twice or nearly twice in 

 head, and 3 or nearly 3 times in the distance to the very short, 

 thick, rounded anal papilla. 



The color in alcohol dusky olive brown, paler to yellowish 

 or whitish beneath, with about seven blackish crossbars, wider 

 than the interspaces, which descend to belly and are most 

 apparent on posterior half; a forward-curved, heavy black line 

 descends from eye to angle of mouth; a more or less waved 

 heavy black line crosses interorbital from eye to eye, terminat- 

 ing in a black spot on upper eye margin ; in front of it are two 

 similar lines and behind it is another line or series of dashes; 

 the first dorsal uniform dull olive brown; the second dorsal 

 pale olive, with numerous crossbars of dusky brown lines or 

 spots, running diagonally downward and backward; the caudal 

 uniform with the body color, the tip darker; the anal very 

 dark olive brown ; the pectoral blackish with a narrow yellowish 

 margin; the ventrals yellowish. 



Here described from the type and cotypes, seven specimens, 

 from 72 to 105 millimeters in length, collected by me from 

 Pinacanawan River, at Lamug, a barrio in the mountains east 

 of Tuguegarao, Cagayan Province. 



Since writing the above I received twenty-eight specimens, 

 82 to 140 millimeters long, from the same river, collected at 

 the barrio of Karoan. 



This is an important ipon goby in the Cagayan Valley. 



159. SICYOPTERUS EXTRANEUS sp. nov. 



Sicyopterus taeniurus JORDAN and RICHARDSON (not of Giinther), 

 Bull. Bur. Fisheries 27 (1908) 279. 



Dorsal VI, 1-11; anal I, 10; there are 55 to 57 scales in a 

 longitudinal series, 14 or 15 in a transverse series, and 14 

 to 16 before first dorsal. 



The low, plump, nearly cylindrical body laterally compressed 

 on posterior third, the nape and head more or less flattened, 

 the depth of body usually equal to its breadth, 5 to 5.4 (4.7 in 

 a gravid female), the head 4.2 to 4.375 times in length; the 

 head rather small, its depth 75 to 85 per cent of its breadth, 

 which is 0.7 to 0.75 of its own length ; the snout convex, rounded, 

 comparatively narrow, 2.16 to 2.5 times in head ; the small eyes 

 lateral, but high up and able to gaze up as well as sideways, 

 2 to 2.6 times in snout, 5 to 6 times in head, and 1.75 to 2.3 

 times in interorbital, which is less than snout; the low inferior 



