52 GOBIES OF THE PHILIPPINES 



dorsal and caudal similar in outline, posterior rays greatly 

 elongated but not quite reaching caudal when depressed; the 

 caudal contained from 3.5 to 3.8 times in head and trunk. 



In alcohol the color dusky gray to blackish, with a broad, 

 very dark brown lateral band extending from before eye, back 

 across its lower part, and on to base of caudal fin; in the La 

 Union specimens each scale had a pale or yellow spot, the spots 

 forming longitudinal rows; there is a black spot in the curve 

 of the interorbital ridge behind eye and a blackish crossbar 

 on base 6f pectoral ; a large black spot on basal or central por- 

 tion of spinous dorsal; the anal blackish with a narrow pale 

 margin; the caudal black, with a broad white upper margin, 

 widest posteriorly. 



Here described from three specimens, 57 to 71 millimeters 

 in length, collected by G. A. Lopez in Daguitan River, Dulag, 

 Leyte, and three specimens, 52 to 61 millimeters in length, 

 collected by J. Montilla at Rabon, La Union Province. The 

 Bureau of Science collection also contains two small poor speci- 

 mens from Capiz, Panay, and an excellent specimen, 54 milli- 

 meters long, from Lake Buhi, Camarines Sur Province. 



This well-marked species seems to have been recorded only 

 by Bleeker, who obtained it from Sumatra, Nias, Singapore, 

 Banka, Java, and Borneo. My specimens agree with Bleeker's 

 description except in the number of scales in a longitudinal 

 series, which he gives as about 30. 



Genus 9. PRIONOBUTIS Bleeker 



Prionobutis BLEEKER, Arch. Neerl. Sci. Nat. 9 (1874) 305. 

 This genus is differentiated at once by the teeth and the form 

 of the head and body, which differ markedly from those of the 

 species of Butis, to which it is closely akin. The head is short, 

 obtuse, with convex profile and strongly elevated and serrate 

 bony crests. The lower jaw is but little or not at all projecting. 

 The teeth are in bands of several rows, those of the outer row 

 conspicuously longer ; no canines are present ; scales in a lateral 

 series 28 to 30. 



17. PRIONOBUTIS KOILOMATODON Bleeker 



PLATE 4, FIG. 2 



Eleotris koilomatodon BLEEKER, Verh. Bat. Gen. 22 (1849) 21. 

 Prionobutis koilomatodon BLEEKER, Arch. Neerl. Sci. Nat. 10 (.1875) 



105 (name only); Versl. Akad. Amsterdam 11 (1877) 73. 

 Eleotris caperatus CANTOR, Cat. Malayan Fishes (1850) 197. 

 Eleotris caperata GUNTHER, Cat. Fishes Brit. Mus. 3 (1861) 1-17; 



DAY, Fishesl of India (1878) 315. 



