190 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 9 



Dorsal origin over upper edge of pectoral base. Upper lip with a narrow, 

 upturned labial flange. Inferior edge of labial canal expanded into a 

 shield or winglike plate. 



Description. — Body elongate, slender; dorsal and ventral outlines 

 extending backward in almost parallel lines to posterior third of tail, 

 thence tapering gradually to a bluntly rounded caudal tip. Body sub- 

 cylindrical anteriorly, becoming compressed posteriorly on tail. Depth 

 16.6 to 18.7 in total length, 2.93 to 3.1 in head. Lateral line well 

 developed, origin on side of nape midway between eye and gill-opening, 

 arching upward over gill-chamber and pectoral base, thence gradually 

 descending to mid-line of sides and continuing almost to tip of tail. About 

 116 pores in its length, 51 pores to opposite vent. 



Anterior nostrils tubular, directed downward, placed just above edge 

 of upper lip near tip of snout. Posterior nostrils large, elliptical pores 

 with slightly raised rims, placed before eye at its mid-depth. A small, 

 round pore with a slightly raised rim directly above the posterior nostril, 

 but their edges not in contact. Mouth moderate, end of maxillary 

 reaching to or slightly past anterior edge of pupil, 3.7 to 3.9 in head. 

 Snout projecting slightly beyond tip of mandible, bluntly pointed, equal 

 to or slightly shorter than eye, 4.75 to 5.1 in head. Interorbital narrow. 



Upper lip with a narrow flange, its free edge upturned against the 

 side of the snout. Anterior end of flange at a pore behind the base of the 

 anterior nostril, and extending posteriorly to rictus of jaws. Labial canal 

 present, its inferior, superior, and interior surfaces bony, external surface 

 covered by skin only. The inferior edge of labial canal expanded into a 

 thin, broad, shield or platelike flange, extending downward and outward 

 toward the oral edge of the upper lip. Pointed bony processes extending 

 outward from the inferior edge of the labial canal entirely absent. 



Two enlarged pores with heavy rims between the anterior nostrils. 

 A large pore behind base of each anterior nostril, its rim expanded into 

 two lips ; dorsal lip small, ventral lip large and folded one over the other 

 partly closing the opening. A series of small pores along labial canal, 

 and continuing upward around posterior edge of eye. Anterior pore of 

 this series beneath posterior nostril. Series of seven pores on each side of 

 lower jaw and throat. A small pore behind rictus of jaws. 



Maxillary teeth in a narrow band of small, close-set, pointed teeth 

 anteriorly, becoming narrowed laterally. Maxillary band united with 

 the somewhat enlarged, slightly recurved, depressible premaxillaiy teeth 



