Jordan and Evcrmann. — Fishes oj North America. 2771 



Subgenus GALEICHTHYS. 



Sliields of head mostly covered by soft skin, hiding the granulations. 



168. GALEICHTHYS LENTIGINOSUS (Eigenmann & Eigenmann) . 



Head 4 to 4i; depth 5 to 6. D. I, 6; A. 22. Eye 2\ iu snout, 8i in 

 head, \\ iu intcrocular, 2J in interorbital. Body nearly terete anteriorly, 

 becoming compressed backward ; the width, above the ])ectoral8, a little 

 greater than the depth. Head flat, depressed, its depth at base of occipital 

 process 1^ in its greatest width, which is about 1^ in its length. Occipi- 

 tal process somewhat roughened, about twice as long as its greatest 

 width, its margin straight and oblique ; the middle of the fontanel above 

 the posterior part of the eye. Head everywhere covered with skin; sides 

 of the head and oi>ercle with vermiculating canals. Snout somewhat 

 pointed; upper jaw very little projecting; lips thick; teeth all villitorm; 

 the intermaxillary band strongly curved; vomerine teeth in 2 oval patches 

 joined to the larger patches of the palatines; mandibnlaiy band of teeth 

 separated in front, the outer margins, if continued forward, forming an 

 angle at the symphysis. Maxillary barbels reaching beyond base of pec- 

 torals ; mental barbels reaching about f toward the gill opening ; the post- 

 mentals to the gill opening in 1 specimen, a little before in the other. 

 Gill membranes forming a broad, free margin across the isthmus. Gill 

 rakers 3-|-4. Pectoral pore minute; humeral process pointed behind. 

 Distance of dorsal from snout 2* in the length, the dorsal spine covered 

 with a membrane, its outer margin granular, its height If in the head, 

 the first soft ray If the length of the fin; distance of adipose fin from the 

 dorsal Sf to 4 in the length, the fin adnate, longer than the dorsal; caudal 

 lunate, the upper lobe longer, somewhat falcate, 4i to 5 in the length; 

 anal fin twice as long as high, the highest ray 2 to 2\ in the head; ven- 

 trals short and broad, \% in the head ; pectoral spine covered with a mem- 

 brane, 1.V to 1?7 in head. Light brown, becoming nearly white below, 

 the sides freckled; fins reddish. Panama. (Eigenmann & Eigenmann, 

 Nematognathi, 50.) 



164. GALEICHTHYS PERUVIANUS, Liitken. 



Head 3^ ; depth 4i to 5^. D I, 7; A. 14 to 16. Eye 2 in snout, 7 iu 

 head, 4 in the interocular, 2 in the interorbital. Subterete, tapering to a 

 long, slender caudal peduncle; the greatest width about equal to the 

 greatest depth Head not much depressed; interorbital area flatfish, 

 the greatest depth of the head 1| in its length, its greatest width 1* to 

 If ; the width at angle of mouth 2 in its length ; the surface of the cranial 

 bones longitudinally furrowed, covered with muscle and skin. Occipital 

 process more than 3 times as long as wide; anterior fontanel elongate, its 

 center over the middle 01 the eye, continued as a deep groove to the base 

 of occipital process; a small opening a pupil's distance behind the ante- 

 rior fontanel, and a larger one in the occipital bone at the end of the 

 groove. Snout, upper part of the neck, and the opercle sometime^ with 

 conspicuous reticulating mucous canals. Snout blunt, decurved. Max- 

 illary barbels extending beyond base of pectoral, mentals about to gill 



