90 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 9 



nostril tubular, near tip of snout. Posterior nostrils above and in front of 

 eye, with a slightly raised rim, but not tubular. Gill openings small, 

 length equals diameter of eye ; opening almost horizontal, below the mid- 

 line of sides. Gular region with heavy longitudinal folds ventrally and 

 laterally. 



Maxillary teeth biserial with the exception of about three teeth lying 

 between the two rows at the mid-point of the gape. Outer series of teeth 

 small, compressed, sharp, close set, and irregular in size. Every fourth 

 tooth is two or more times as long as the three intervening teeth. Inner 

 series of large, widely spaced, fanglike, depressible canines, nine on a side. 

 Three large, depressible canines on the median line of the premaxillary 

 plate. Fourteen small, conical, uniserial teeth on the shaft of vomer. Man- 

 dibular teeth biserial. Outer series small, compressed, sharply pointed, and 

 close-set teeth of irregular size. Inner series of 11 widely spaced, large, 

 sharp, fanglike canines. 



Color a uniform brown, except for the lower jaw, the chin, and the 

 gular region, which are light tan faintly mottled with darker. Skin in the 

 longitudinal folds of the gular region darker than the surface. 



G. octavianus is distinguished from other species of this genus found 

 in this area by its long and slender head, the presence of extremely long, 

 fanglike teeth, the wide cleft of the mouth, which does not completely 

 close, the thin lips, which do not entirely cover the teeth when the gape is 

 closed, the unifoiTn brown color, and the insertion of the dorsal fin. 



