4o6 Memoir Sears Foundation for Marine Research 



than long, with 5 (sometimes 7) short, marginal teeth and an equal number of low ridges: 

 in the larger specimen, probably of this species, the denticles usually have 7 ridges and 

 teeth. 



Head to origin of pectoral a little less than V3 of length (29%) to origin of caudal, 

 moderately flattened above. Snout broadly rounded, its length anterior to a line connecting 

 outer ends of nostrils a little less than V2 as great as length in front of mouth, the length 

 in front of mouth nearly % (74%) as great as breadth of mouth or about V3 of length of 

 head to origin of pectorals. Eye approximately circular, its diameter a little less than Vs 

 as long as distance between nostrils and about as long as ist gill opening. Third gill opening 

 (a little the longest) a little more than % (42%) as long as distance between nostrils, the 

 5th about % as long as 3rd and more oblique than the others, the 3rd gill opening above 

 origin of pectoral. Nostril strongly oblique, its inner corner nearer to mouth than to the tip 

 of snout by a distance a little longer than its own length or diameter of eye, its anterior 

 margin expanded toward inner end as a distinct but low subtriangular lobe. Mouth broad- 

 ovate, a little less than % (about 62 to 64%) as high as wide. 



Teeth -jI^I^yI- ; uppers triangular, ist and 2nd erect and nearly symmetrical, with 

 concave margins and expanded bases, but subsequent teeth increasingly oblique toward 

 corners of mouth, their inner margins nearly straight, but their outer margins more and 

 more deeply concave in subangular contour, the outermost strongly so, the margins regu- 

 larly serrate from tip to base, most strongly so outwardly on basal sector; lower teeth 

 nearly erect, except for the outermost 3 or 4, which are moderately oblique, their cusps 

 much more slender than those of uppers, on broadly expanded bases, their margins much 

 more finely serrate than those of uppers; one small symmetrical tooth at symphysis, and 

 outermost 3 to 5 successively smaller in each jaw. 



Origin of ist dorsal a little anterior to inner corner of pectoral, its base nearly as long 

 as from posterior edge of eye to ist gill opening, its vertical height about equal to its base, 

 its anterior margin only weakly convex toward the apex, the posterior margin only weakly 

 concave (less so than in obscurus), apex narrowly rounded, the free rear corner only about 

 Vs to V4 as long as the base (thus relatively shorter than in obscurus), the midpoint of 

 base about 1.7 times as far from origin of pel vies as from axil of pectoral. Second dorsal 

 between Yo and V3 as long at base as ist, relatively lower, its vertical height about % as 

 great as its length at base, its free rear corner a little shorter than its base, its posterior 

 margin weakly concave, its extreme length from origin to rear tip about 2.5 times as great 

 as the vertical height (considerably shorter relative to its height than in obscurus) , its origin 

 about opposite to that of anal. Caudal between Vs and V4 (29.8%) of total length, its 

 terminal sector about V4 of total length of fin, slender, with narrowly rounded tip and 

 weakly concave lower posterior outline; the lower lobe (expanded lower anterior corner) 

 only a little less than V2 (about 47%) as long as upper (somewhat longer, relatively, than 

 in obscurus), with weakly convex anterior margin, nearly straight posterior margin, and 

 narrowly rounded tip, the re-entrant corner (included by the 2 lobes) well rounded. Dis- 



