CRYPTOCENTRUS 239 



I also place here a specimen in bad condition, 85 millimeters 

 long, collected at Jolo. 



This species was recorded from southern Negros by Jordan 

 and Richardson and occurs throughout the East Indies to New 

 Guinea, where it was originally collected by Quoy and Gaimard. 



Genus 47. CRYPTOCENTRUS (Ehrenberg) Bleeker 



Cryptocentrus (Ehrenberg MS.) BLEEKER, Esq. Syst. Nat. Gobioides, 

 Arch. Neerl. Sci. Nat. 9 (1874) 322; JORDAN and SNYDER, Proc. U. 

 S. Nat. Mus. 24 (1901) 72. 



The body moderately elongate, covered with minute cycloid 

 scales, 75 to over 100 in a longitudinal series; the naked head 

 large, broad, narrowed above, blunt, with strongly convex snout, 

 the eyes high up and close together; the mouth large, oblique, 

 not opening readily, the maxillary extending beyond eye, the 

 chin prominent; the teeth in several rows in each jaw, rather 

 large, those of outer row enlarged, and a pair of more or less 

 well-developed canines posteriorly in lower jaw; the first dorsal 

 short, the spines flexible and sometimes filamentous; the second 

 dorsal longer than anal, both extending to base of caudal or 

 beyond when depressed; pectorals without silky rays above; the 

 ventrals long; the caudal round-pointed to somewhat acute, and 

 longer than head; the gill openings very broad, the isthmus 

 narrow. Dorsal VI, 1-10 to 20; anal I, 9 to 21; branchioste- 

 gals 4. 



This genus comprises numerous species of brightly colored 

 gobies occurring from the Red Sea to southern Japan. 



Key to the Philippine and China Sea species of Cryptocentrus. 



a 1 . A black spot between first and second dorsal spines. 



ft 1 . Spot near tip of membrane; 85 scales in longitudinal series, 32 in 



transverse series C. cebuanus. 



b 2 . Spot near base of membrane; 105 scales in longitudinal series, 40 in 



transverse series C. filifer. 



a 2 . No black spot between first and second dorsal spines. 



c 1 . Body with five dark brown crossbands; 90 to 104 scales in longitudinal 

 series, 27 in transverse series; first dorsal pale brown; second dorsal 



pale brown with yellow spots along base C. fontanesii. 



c 2 . Body without five dark brown crossbands. 



eP. About 75 longitudinal scales, 30 transverse scales; first dorsal deep 

 black from first to third spines inclusive; a large basal black 

 spot between spines 5 and 6; body uniform yellowish.... C. vagus. 

 d 2 . About 90 longitudinal scales, 27 transverse scales; first dorsal 

 purplish brown; sides of head with widely scattered blue or dark 

 brown spots; body light brown with a dark brown saddle from 

 back to belly C. venustus. 



