Fishes of the Western North Atlantic 



125 



Description. Proportional dimensions in per cent of total length. Male, 1,598 mm., 

 from Ocean City, Maryland (Harv. Mus. Comp. Zool., No. 35899). Male, 2,337 mm., 

 from Bahamas (Harv. Mus. Comp. Zool., No. 35367). 



Trunk at origin of -pectoral: breadth 10.3, 12.4; height 1 1.3, 1 1.9. 



Snout length in front of : o\ite.vnos\.v\\?, A,.l, j mouth 6.1,6.5. 



Eye: horizontal diameter 1.8, 1.8. 



Mouth: breadth 6.2, 6.1 ; height 5.0, S-^- 



Nostrils: distance between inner ends 3.4, 3.8. 



Labial furrow length: upper I . i , ; lower 0.6, . 



Gill opening lengths: ist 6.9, 6.9; 2nd (}.()^ 5 3rd 6.4, -; 4th 6.3, 5 



5th 6.8, 7.2. 



F;W/<iorjfl/j^«; vertical height 9.2, lO.Oj length of base 8.8,9.1. 



Second dorsal fin: vertical height 1.6, 2.1 ; length of base 1.6, i.i. 



Anal fin: vertical height 1.9, 2.1 j length of base 1.5, 1.4. 



Caudal fin: upper margin 20.6, 21.8; lower anterior margin 15.5, 16.7. 



Pectoral fin: outer margin 17. i, ; inner margin 4.8, j distal margin 



14.0, . 



Distance from snout to: ist dorsal 36.6, 34.8; 2nd dorsal 69. o, 68.5; upper caudal 



79.4, 78.2; pectoral 26.1, 25.05 pelvics 53.2, 50.O} anal 70.5, 68.5. 



Figure 18. Imrus oxyrinchus, young male, 1,640 mm. long, taken off Ocean City, Maryland (Harv. Mus. 

 Comp. Zool., No. 35899). A Left nostril, about l.I x. 5 Caudal peduncle viewed from above, about Y^ 

 natural size. C Cross section of caudal peduncle at point indicated by the transverse line on B. D Pelvic fins 

 and claspers. E Second dorsal and anal. F Dermal denticles, about 32 x. G Apical view of dermal denticle, 

 about 65 X. 



