3o6 Memoir Sears Foundation for Marine Research 



Pectoral fin: outer margin 14.0, 15.5; Inner margin 4.9, 5.3; distal margin 10.7, 



1 1.4. 



Distance from snout to: ist dorsal 30. 3, 30. 7 } 2nd dorsal 60. 7, 60. 7 ; upper caudal 



71.9,71.8; pectoral 25.0, 24.O; pelvics48.o, 46.6; anal 59.5, 59.7. 



Interspace between: ist and 2nd dorsals 19.3, 19.6; 2nd dorsal and caudal 6.6, 



j.S; anal and caudal 6.0, 6.4. 



Distance from origin to origin of: pectoral and pelvics 23.4, 24. i ; pelvics and anal 



12.5,13.4. 



Trunk moderately slender, its height at ist dorsal a little less than Vs its length to 

 caudal pit. No mid-dorsal ridge. Caudal peduncle only slightly compressed, without 

 lateral ridges. Precaudal pits subtriangular. Body sector to cloaca a little longer than tail 

 sector. Dermal denticles small, closely overlapping, a little broader than long, their blades 

 horizontal, broadly oval, with 3 low ridges and as many short teeth, the median only a little 

 the longest; pedicels slender. 



Head about V4 of total length, moderately flattened above and a little broader oppo- 

 site corners of mouth than in region of gill openings. Snout wedge-shaped, its tip narrowly 

 rounded, its length in front of mouth about V4 of length of head. Eye approximately cir- 

 cular, its anterior edge about opposite front of mouth, its horizontal diameter about ^4 as 

 long as snout in front of mouth. Gill openings 3 and 4 (slightly the longest) about % as 

 long as snout in front of mouth, 2^/4 times as long as diameter of eye and about as 

 long as distance between nostrils, the ist and 5th slightly the shortest; the spaces between 

 successive gill openings about equally broad at upper ends, but those between 3rd and 

 4th, and 4th and 5th much narrower at lower end, the 5th opening moderately oblique and 

 over origin of pectoral, the 4th close in front of latter. Nostril strongly oblique, its outer 

 corner at margin of snout, its inner corner nearer to mouth than to tip of snout by a dis- 

 tance about equal to horizontal diameter of eye, its anterior margin only very slightly 

 expanded in subtriangular outline. Mouth broadly rounded in front, about V2 as high as 

 broad, occupying about % of breadth of head. A well marked labial furrow around corner 

 of mouth and extending inward for a very short distance on each jaw, the lower usually 

 concealed when mouth is closed. 



Teeth '^ |° '^3^^ [° \\ j similar in the 2 jaws, smooth-edged, symmetrical, with sharp, 

 slender, erect median cusp without lateral denticles, on broad bases; i small tooth at sym- 

 physis in upper jaw and 3 in lower, the median minute, as are the outermost 2 teeth in 

 each jaw. 



Origin of ist dorsal a little posterior to axil of pectoral, its anterior margin slightly 

 convex, its posterior margin deeply concave, its apex rounded, its free rear corner mod- 

 erately slender and a little less than ^/^ as long as its base, its anterior margin about V2 as 

 long as head. Second dorsal about % as long at base as ist dorsal, but only V4 as high 

 vertically, its free rear corner nearly'as long as its base, its origin a little posterior to origin 

 of anal. Caudal between Vs and % (about 28%) of total length, its axis raised at an angle 



