Fishes of the Western North Atlantic 339 



shorter distance from origin of anal to tips of pelvicsj C. nkaraguensis appears to be a 

 landlocked variant of it (see discussion, p. 381). 



Description. Proportional dimensions in per cent of total length. Female, 924 mm., 

 from Florida (Amer. Mus. Nat. Hist.). 



Trunk ai origin of pectoral: hrea.dth. 12.8} height 12.9. 



Snout length in front of: outer nostrils 2.0} mouth 6.6. 



Eye: horizontal diameter 1.5. 



Mouth: breadth 9.85 height 4.9. 



Nostrils: distance between inner ends 6.7. 



Gill opening lengths : ist 2.95 2nd 3.25 3rd 3.2; 4th 2.9} 5th 2.4. 



First dorsal fin: vertical height 9.6; length of base 13.4. 



Second dorsal fin: vertical height 4.1 j length of base S-S- 



Anal fin: vertical height 4.9; length of base 5.3. 



Caudal fin: upper margin 28.35 lower anterior margin 12.3. 



Pectoral fin: outer margin 20.6; inner margin 6.6:, distal margin 17.6. 



Distance from snout to: ist dorsal 27.O; 2nd dorsal 60.O; upper caudal 71.7; 



pectoral 21.4; pelvics 48.3; anal 60.0. 



Interspace between: ist and 2nd dorsal 21.O; 2nd dorsal and caudal 7.0; anal and 



caudal $.$• 



Distance from origin to origin of: pectoral and pelvics 28.4; pelvics and anal 1 1.3. 



Trunk moderately stout, its height at origin of ist dorsal about Vs of its length to 

 precaudal pits, its breadth at origin of pectorals about equally great, its dorsal profile 

 more convex than the ventral. Midline of back smooth, without dermal ridge, either in em- 

 bryo or in adult. Anterior outline of upper caudal pit obtusely subangular in smaller 

 specimens, the lower caudal pit less well marked than upper but similar in outline. Dermal 

 denticles moderately raised so that skin feels slightly rough when stroked toward head, 

 loosely spaced and overlapping but little, as broad as long, or a little broader, usually with 

 3 low ridges in smaller specimens, but perhaps more often 5 in larger, with 3 prominent 

 teeth (the axial considerably the largest) separated by rounded notches; if there are 5 

 teeth, the outermost pair are very small; pedicels very short and broad. 



Head very wide, its breadth as great opposite corners of mouth as at origin of 

 pectoral or slightly greater and only a little narrower at eyes. Snout thick, very broadly 

 rounded and notably short, its length in front of a line connecting outer ends of nostrils 

 only between y^ and V2 (30 to 42%) as great as distance between inner ends of latter 

 in specimens seen, its length in front of mouth a little less than Va of length of head to 

 origin of pectoral. Eye approximately circular, small, its diameter a little less than ^ 

 as great as distance between inner ends of nostrils. Longest gill openings (2nd and 3rd) a 

 little more than twice as long as diameter of eye or about half as long as distance between 

 inner ends of nostrils, the 5th only a little more than % that long; all about evenly 

 spaced, the 4th about over origin of pectoral. Nostril strongly oblique, its inner end 



