402 Memoir Sears Foundation for Marine Research 



oped, subangular and a little less than a right angle in outline, the lower pit only weakly 

 marked. Dermal denticles overlapping so regularly that the skin is exposed only here and 

 there, the blades rising rather steeply, a little broader than high, with 3 to 5 very low 

 ridges and 3 to 5 short, broad teeth, the median considerably the largest and the outermost 

 pair very small when there are 5; pedicels very short. 



Head a little less than Vs length of trunk to origin of caudal, its dorsal profile sloping 

 evenly forward. Snout moderately thin-tipped, ovate, with broadly rounded tip, its length 

 anterior to a line connecting outer ends of nostrils a little more than % (about 69 to 73%) 

 of distance between inner ends of latter, its length in front of mouth about 1.3 times dis- 

 tance between nostrils and a little less than Vs (about 30%) as great as length of head to 

 origin of pectoral. Eye approximately circular, its anterior margin opposite or very slightly 

 behind front of mouth, its diameter a little more than V3 (about 35%) as great as distance 

 between nostrils. Gill openings about evenly spaced, their margins weakly concave, the 

 I St about V2 (50%) as long as distance between nostrils and a little less than 1.5 times as 

 long as horizontal diameter of eye, the 2nd and 3rd very slightly the longest, the 5th about 

 % (74 to 85%) as long as ist, the space between 4th and 5th over origin of pectoral. 

 Nostrils strongly oblique, about % as long as distance between their inner ends, which are 

 a little less than twice as far from tip of snout as from mouth, the anterior margin moder- 

 ately expanded as a low subangular lobe with rounded apex. Mouth ovate, about % 

 (67%) as high as broad, occupying about % of breadth of head. Upper labial fold between 

 Ys and V4 as long as diameter of eye. 



Teeth '^ to i5--ij)r2— u jo 15 . uppers with narrow triangular cusps on moderately ex- 

 panded bases, nearly symmetrical toward center of mouth but slightly oblique toward its 

 corners, both margins concave, the outer margins increasingly so toward corners of mouth 

 in subangular contour, the edges regularly and rather finely serrate from tip to base except 

 for the outermost i or 2 teeth, which are only irregular or wavy, the ist to lOth or nth 

 teeth of about equal lengths, but subsequent teeth successively shorter, the outermost very 

 short J lower teeth with considerably narrower cusps than uppers, on more broadly ex- 

 panded bases, erect and symmetrical all along jaw, the edges much more finely serrate 

 than uppers from tip to base, the 2nd to nth longest and the outermost very short} i or 2 

 small teeth at symphysis in upper jaw and i in lower. 



Origin of ist dorsal about over inner corner of pectoral, its vertical height a little 

 more than Vs as great as length of head, its anterior margin slightly convex toward apex, 

 its posterior margin moderately concave toward base, its apex moderately rounded, its 

 free rear corner only about Vs as long as the base, the midpoint of base only a little nearer 

 to axil of pectoral than to origin of pelvics. Second dorsal slightly less than V2 as long at 

 base as ist and a little less than Vs as high vertically, its apex broadly rounded, its rear 

 margin only very slightly concave, its free rear corner about as long as its base, its origin a 

 little posterior to origin of anal but considerably anterior to midpoint of latter. Caudal a 

 little more than V4 (27 to 28%) of total length, its upper margin only slightly convex 



