CRYPTOCENTRUS 241 



sides of head spotted with large, dark brown circular dots ; near 

 tip of membrane between first and second spines of first dorsal 

 a deep black spot ; the upper margin of caudal tip a broad black 

 line; no other markings left on caudal, second dorsal, anal, or 

 pectorals; the ventrals black centrally, fading to light brown 

 at outer margins. 



Here described from the type and only specimen, 89 milli- 

 meters long, collected at Cebu by Prof. A. L. Day. 



116. CRYPTOCENTRUS FILIFER (Cuvier and Valenciennes) 



Gobius filifer CUVIER and VALENCIENNES, Hist. Nat. Poiss. 12 (1837) 



80. 

 Gobius knutteli BREKKER, Act. Soc. Sci. Indo-Neerl. 3 (1858) 16, pi. 1, 



fig. 2; GUNTHER, Cat. Fishes Brit. Mus. 3 (1861) 73. 

 Cryptocentrus filifer JORDAN and SNYDER, Proc. U. S. Nat. Mus. 24 



(1901) 72, fig. 12. 



Dorsal VI, 1-10; anal I, 9; there are about 105 scales in a 

 longitudinal series and 40 in a transverse series. 



The body moderately elongate, somewhat rounded or laterally 

 compressed, both profiles converging from origin of first dorsal 

 to caudal peduncle, the depth 5.1 to 5.4 times in length; the 

 head large, 3 to 3.3 times in length, broader than trunk but 

 deeper than wide ; its depth sometimes greater than that of body, 

 the blunt convex snout very steep, 4 times in head; the eyes 

 placed very high, lateral, 4.4 to 4.6 times in head and about 

 H times in snout; the interorbital space narrow, its breadth 

 about 3 times in eye; the gape of the large oblique mouth ex- 

 tends back to a point below posterior margin of eye or beyond, 

 the maxillary extending more than halfway across preopercle; 

 the teeth of upper jaw in four or even five rows anteriorly, 

 those of outer row more than twice as large as the others; in 

 lower jaw are five rows of slender teeth of nearly uniform 

 size, with a pair of rather small and easily lost lateral canines 

 in outer row; the scaleless head and nape marked by many 

 longitudinal and crosslines of minute papillae; the body covered 

 with minute cycloid scales, largest posteriorly, deeply embedded 

 in the skin and rather widely spaced anteriorly, their position 

 over most of body indicated by shallow pits; the first dorsal 

 very high, all the spines with more or less elongated tips, the 

 first or second spine longest, more than twice depth of body 

 and nearly half again as long as head; the second dorsal high 

 the posterior rays longest, equal to or greater than greatest depth 

 of body, extending upon caudal when depressed; 'the base of 



