GILBERT AKD STAIiKS - FISHES OF PANAMA BAY 



187 



Measuretnenls in Hundredths of Length without Caudal. 



Length to base of caudal in mm 



Length of head 



Greatest width of head 



Length of snout 



Diameter of eyeball , 



Interorbital width 



Length of maxillary 



Greatest depth of body , 



Depth of caudal fKrduncle , 



Snout to first dorsal spine 



Base of second dorsal Cto base of last ray) , 



Snout to front of anal 



Base of anal (to base of last ray) 



Length of caudal 



Length of pectoral (from middle of axil) 



Length of ventral (outer rayj 



332. Thalassophryne dowi Jordan dc Gilbert. 



This species seems to be rarely taken. A single specimen was obtained by 

 us, loO ram. long. The only others known are the three types from Punta Arenas, 

 Costa Rica, and two specimens dredged by the Albatross in the Bay of Panama. 



The lower half of the body is whitish, unmarked; the dorsal portion Ls blackish, relieved by 

 the white lateral line and by a few irregular blotches of white, which are most numerous toward the 

 middle of the sides. The head is blackish alxjve and on sides, very finely marbled with gray. The 

 lower lip and the front of the lower jaw are similarly marked; the gular membrane is slightly dusky; 

 the under side of the head otherwise white. The eyes are seen with difficulty, being colored like the 

 surrounding area. The anal is white, except some of the posterior rays, which are margined with 

 black. The basal half of the dorsal is white or grayish, sharply contrasting with the black marginal 

 half. The terminal half of caudal is jet-black, the Iwsal half white, blotched more or less with brown. 

 The ventrals are white; the pectorals white, marbled with brown on their basal fXjrtion. Teeth in 

 premaxilbries small, in two series, the front tooth of the outer series on each side a strong conical 

 canine. Sides of mandible with a single series of strong canines, which increase in size backward to 

 the eighth or ninth, then suddenly diminish. On the front of the mandible, are two series of similar 

 teeth. The vomer contains twelve canines, increasing in size laterally. The fjalatine teeth are in a 

 single series, about twelve in number on each side, large and small teeth regularly alternating in the 

 series. 



The head is contained 3| to 4 times in the length. It b cuboid in shape, with vertical cheeks, 

 and very oblique mouth; in appearance resembling Astroscopus. Greatest depth of head three-fourths 

 its greatest width. 



