DEC. 28, 1916. FISHES OF PANAMA MEEK AND HILDEBRAND. 243 



interorbital 4.13 to 4.73; mouth narrower than length of snout; upper 

 jaw a little in advance of the lower; maxillary barbels usually reaching 

 to or somewhat past origin of anal; teeth in villiform bands, none on 

 vomer or palatines; occipital process long and narrow, reaching dorsal 

 plate; fontanel long and narrow, reaching backward to or a little beyond 

 posterior margin of pupil; origin of dorsal about midway between tip of 

 snout and origin of adipose; dorsal spine a little longer than eye and 

 snout; adipose fin varying in length, but always longer than head, 3 to 

 3.95 in length of body; caudal fin deeply forked, the upper lobe much the 

 longer, notably longer than head; anal fin without a spine, its origin a 

 little behind origin of adipose; ventral fins failing to reach origin of anal, 

 inserted just behind vertical from base of last dorsal ray; pectoral fins 

 rather short, the spine without hooks on its distal third or fourth, but 

 with strong hooks on basal portion, its length 1.2 to 1.63 in head. 



Color greenish, with a jet black lateral band and another pair of 

 bands on each side of median line of back, extending from nape to upper 

 surface of caudal peduncle. Fins unmarked. 



This species is represented by numerous specimens, ranging in length 

 from 40 to 142 mm. Common on both slopes of Panama. 



This species can inflict most painful wounds with its fin spines, which 

 bear poison glands at the base. 



Habitat: Both slopes of Panama. 



4. Genus Trachycorystes Bleeker. 



Trachycorystes Bleeker, Nederl. Tijdschr. Dierk., I, 1863, 88 (type 



Trachycorystes typus Bleeker = Auchenipterus trachycorystes Cuvier 



& Valenciennes). 

 Parauchenipterus Bleeker, Nederl. Tijdschr. Dierk., I, 1863, 88 (type 



Parauchenipterus galeatus Linnaeus). 



Body elongate or robust, covered with naked skin; occipital firmly 

 joined to dorsal plate; lower jaw usually projecting; mandibular barbels 

 in 2 pairs, one pair of maxillary barbels; teeth in villiform bands, none 

 on vomer or palatines; eye small, lateral, covered with skin; dorsal with 

 a spine and from 4 to 6 rays; adipose fin shorter than anal; caudal fin 

 obliquely truncate, emarginate or rather deeply concave, the lobes round 

 or pointed; outer margin of pectoral spine serrate. 



4. Trachycorystes amblops (Meek & Hildebrand). 



Felichthys amblops Meek & Hildebrand, Field Mus. Nat. Hist. Pub., 



Zool. Ser., X, 1913, 77 (Rio Tuyra, Marrigante, Panama). 



Head 3.7 to 4.35; depth 3.85 to 5.25; D. I, 5; A. 17 to 20. 



