1912.] NATURAL SCIENCES OF PHILADELPHIA. 31 



conic though tips not sharp pointed, forming an erect outer series 

 and a median series of 3 larger and partly movable broad-based 

 ones. All vomerine region from about opposite beginning of eye 

 backwards with series of 3, and in widest portion of area 4, of broad 

 low convex molar-like teeth. Surface of this whole area also convex. 

 Along sides of upper jaw, also extending well forward though rather 

 irregularly, two rows of small and rather slender obtusely-pointed 

 teeth, these also in places partly movable. Mandibular teeth low, 

 molar-like, biserial, largely uniform in size, close-set, and only 

 anterior inner series more enlarged with outer series decreasing in 

 size. No tongue. Mandible strong, convex, curved so that only 

 symphyseal region approximates front of upper jaw, and tip a little 

 shorter than slightly protruding snout. Front nostril in fleshy tube 

 each fide of snout tip, length 2 in eye. Hind nostril simple pore 

 over eye front, edge hardly elevated. 



Gill-opening short and nearly horizontal slit about midway in 

 axis of body, length about equals eye. Pharynx well swollen, 

 surface smooth and but few slight lateral longitudinal short grooves. 

 Skin tough, smooth. Along each upper lip laterally 4 pores, and 

 along each mandibular ramus 6 pores. On snout 3 pairs of pores, 

 first at tip, second between nasal tubes and third midway hi snout 

 length. No 1. 1. 



Dorsal origin little nearer gill-opening than mouth corner, fin 

 high and continuous with caudal. Latter rounded, length 1^ in 

 eye. Anal like dorsal, only lower. Vent close before anal. 



Color in alcohol rich brown generally, a trifle darker above on 

 trunk than below, though tail more unicolor. Along back about 

 24 transverse obscure ill-defined and slightly darker bars or bands, 

 these not continuous across belly or only after vent. Through eye 

 and passing over forehead and mandible median ly a deep brown 

 transverse band though not continuous on lower surface of mandible. 

 Another ill-defined band, though leaving a quite dusky blotch or 

 tinge at rictus passes similarly behind latter, though including it in 

 its course. Transverse bands also reflected on dorsal and anal. 

 Body most everywhere on trunk, tail and fins, with more or less 

 swarthy appearance. End of muzzle largely whitish, surface of 

 snout above and symphyseal region of mandible slightly tinged with 

 brownish. Edges of fins not darker, except where bands extend 

 more or less completely. Eye pale slaty. Inside mouth whitish. 

 Length 15| inches. 

 Type No. 38,164, A. N. S. P. No data (though taken from a jar 



