DR. GtJNTHBR ON THE FISHES OF CENTRAL AMERICA. 419 



The second anal spine is strong, and somewhat longer than the tliird, hut not quite as 

 long as the fourth of the dorsal fin. Scales above the pectoral fin not conspicuously 

 larger than the others. More or less conspicuous oblique brown streaks run along the 

 series of scales, and are broken up into series of spots in larger examples. A vertical 

 black spot covered by the angle of tlie procoperculum. 



We possess four examples of this species : three were collected by ('apt. Dow at 

 Panama; and the fourth is from Puerto CabcUo. The largest is 8 inches long. 



35. H^MULOX MARGARITIFERUM. (PI. LXV. fig. 2.) 

 Ouiith. Proc. Zool. Soc. 1864, p. 147. 



D. jl A. l\. L. lat. 55. I-. transv. 6 15. 



T])e height of the body is one-third of the total length (witliout caudal), the length 

 of tlic head two-sevenths. The diameter of the eye is two-sevenths of the latter, and 

 equal to the extent of the snout and to the width of the interorbital space, which is 

 very convex. The maxillary extends beycmd the vertical from the anterior margin of 

 the eye. Prseojierculum emarginate behind. Dorsal fin scarcely notched, with the 

 soft portion very low ; its spines are moderately strong, the fourth is the longest, not 

 quite half as long as the head. Anal spines strong ; the second is longer and stronger 

 than the third, and equal to the eighth of the dorsal. The soft vertical fins enveloped 

 in scales ; caudal forked, with the upper lobe longest. The pectoral fin does not extend 

 to the vent. Greenish olive above, each scale with a pearl-coloured centre ; sides 

 silvery ; a blackish spot above the axil. 



One specimen, 12 inches long, was obtained by Messrs. Dow and Sahin on the 

 Pacific coast of Panama. 



39. Ch.ETODOX HUMERALIS. (PI. LXV. fig. o.) 

 (jiiiith. Fish. ii. p. 19. 



I have given a full description of this species (/. c). The Pacific coast of Central 

 America appears to be its true home. Messrs. Salvin and Dow collected tliree speci- 

 mens at Panama ; and our other specimens, which we received from the Haslar Collec- 

 ti(m, are probably from Guatemala, from wliich country Sir J. Richardson, as we 

 know, obtained a collection of fishes. I have no doubt that the statement of this 

 species extending to the Sandwich Islands is correct. The Panama examples differ 

 from the typical specimens only in ha\ing an additional black cross band near the 

 hind margin of the caudal fin. 



41. POMACANTIirs ZOU'KCTUS. 

 Pomaranthodes zonipectus, Ciill, Proc. Ac. Nat. Sc. Pliilad. IHO.'J, p. '211. 



■'The form much resembles that of Fomaconthus. The greatest height equals three- 



3 M 2 



