DE. GUNTHEB ON THE FISHES OF CENTEAL AMEBICA. 473 



the maxillary is a little more than one-third of the length of the head ; maxUlary scaly. 

 Interorbital space very narrow, concave, one-third of the vertical width of the orbit ; 

 the concavity is produced by two ridges convergent posteriorly. Head nearly entirely 

 covered with ciliated scales. Rays of the vertical fins scaly, the distance between the 

 dorsal and caudal fins is one-half of the depth of the free portion of the tail. The 

 longest dorsal rays are somewhat behind the middle of the fin, and four-ninths of the 

 length of the head. Pectoral rays not prolonged. Body nearly uniform reddish olive ; 

 some of the dorsal, anal, and caudal rays with elongate dark-brown spots. 



One specimen, 7 inches long, was collected by Messrs. Dow and Salvin on the Pacific 

 coast of Panama. 



198. PSEUDOBHOMBUS BKASILIENSIS. 



Hippoglossus brasiliensis, Eanzani, Comm. Bonon. v. p. 10, tab. 3. 

 Rhombus aramaca, Casteln., not Cuv. 

 Pseudorhombus vorax, Giinth. Fish. iv. p. 429. 



This species is known to occur on the coast of Brazil ; however, there is a specimen 

 in the British Museum, which formed part of a collection containing numerous fishes 

 from Guatemala ; and I mention it, therefore, in this list to draw attention to this species. 



200. Aphoristia oknata, var. elongata. 



Two examples, 5 inches long, collected by Mr. Salvin on the Pacific coast of Panama, 

 differ, from specimens from the West Indies, only in having the body more elongate, its 

 depth being contained four times and two-thirds in the total length (with the caudal). 

 The number of fin-rays is the same, viz. D. 97, A. 82 ; L. lat. 98. 



201. Amiueus mekidionalis. (Plate LXXXI. fig. 1.) 



Giinth. Pish. v. p. 103. 



D. 1/6. A. 28-29. P. 1/9. 



Head one-half or one-third longer than broad ; the maxillary barbels extend to the 

 end of the head. The length of the dorsal spine is somewhat less than that of the head 

 without snout, and nearly equal to that of the pectoral spine. Adipose fin short. Tlie 

 height of the body is one-fifth of the total length (without caudal), the length of the 

 head one-fourth or two-ninths. Snout obtusely rounded, with the upper jaw longer 

 than the lower. The diameter of the eye is one-half or two-fifths of the extent of the 

 snout, and one-third or two-sevenths of the length of the postorbital portion of the 

 head. The band of maxillary teeth is five or six times as broad as long. The outer 

 mandibulary barbels extend to the posterior margin of the gill-membrane. The distance 

 of the dorsal spine from the snout is a little more than one-half of its distance from the 

 caudal fin ; it is finely serrated behind. The length of the base of the adipose fin equals 

 that of the dorsal. Caudal fin deejjly forked ; the upper lobe is somewhat the longer, 



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