DR. GUNTHER ON THE FISHES OF CENTRAL AMERICA. 481 



248. IIaplociiilus dovii. (Plate LXXXII. fig. 5.) 



Giinth. Fish. vi. p. 315. 



D. 8. A. 14. V. G. L. lat. 31. L. transv. 8. 



The height of the body is contained five times in the total length (without caudal), 

 the length of the head thrice and two-thirds ; head elongate, low, and depressed, with 

 the snout much produced and the upper jaw somewhat longer than the lower ; the eye 

 occupies exactly the middle of the length of the head, its diameter being two-ninths of it, 

 and more than one-half of the width of the interorbital space, which is flat. The origin 

 of the dorsal fin is a little nearer to the extremity of tlie caudal than to the gill-opening, 

 and corresponds to the twenty-third scale of the lateral line. Anal fin entirely before 

 the dorsal ; pectoral extending to ventral, which reaches the vent ; caudal roimded ; all 

 the fins well developed. Light brownish olive ; posterior half of the dorsal and anal fins 

 with black cross bands ; basal half of the caudal with round light spots. 



Two specimens, 6 inches long, probably males, were collected by Capt. Dow at Punta 

 Arenas, Costa Rica. 



249. Fu-VDULus L.\BiALis. (Plate LXXXIV. figs. 1 & 2.) 

 Gunth. Fish. vi. p. 319. 



B. 6. U. 13-14. A. 10-17. V. 6. L. lat. 37-39. L. transv. 15. 



The height of the body, taken on the level of the base of the pectoral, is two-ninths 

 of the total length (without caudal). Head rather depressed, its length being contained 

 four times or four times and a third in the total. Interorbital space broad, slightlv 

 convex, its width being less than one-half of the length of the head. Snout broad, 

 obtuse, depressed, with the jaws perfectly equal in front; mandible very short, not 

 longer than the eye. Upper lip well developed, broad, extending to the angle of the 

 mouth. The diameter of the eye is less than the length of the snout, or than one- 

 fourth of that of the head, and, in females, one-half of the width of the interorbital 

 space, whilst in males the forehead is somewhat narrower. The origin of the dorsal 

 fin is midway between the extremity of the caudal and the orbit, and corresponds to the 

 first ray of the anal. Dorsal fin as high as long in both sexes ; anal fin rounded in the 

 male, scarcely higher than long; much elevated in the female, the length of its base 

 being two-thirds only of its depth. Genital opening of the female immediately in 

 front of, but disconnected from, the anal fin. I'asal third of the caudal fin (which is 

 subtruncate) scaly. Body uniform brownish olive, paler below ; sometimes irregular 

 cloudy markings on the tail. Fins immaculate ; the anal fin of the male is black at the 

 base, and bright yellow on its marginal half; also the upper margin of the dorsal fin of 

 the same sex is yellowish. 



Numerous examples, up to 4^ inches long, were collected by Messrs. Salvin and 

 Godman in the Rio San Geronimo and at Yzabal. Figure 1 represents the male, and 

 fig. 2 the female. j 



VOL. VI. — PART VII. I 3 u 



