Fishes of the Western North Atlantic 



305 



Description. Proportional dimensions in per cent of total length. Female, 504 mm., 

 from Galveston, Texas (U.S. Nat. Mus., No. 1 18457). Male, 560 mm., same locality 

 (Harv. Mus. Comp. Zool., No. 35831). 



Trunk at origin of pectoral: breadth 11.3, 10.7; height 11.3, 12.1. 



Snout length in front of: outer nostrils 4.1, 3.8; mouth 6.8, 7.1. 



Eye: horizontal diameter 1.9, 1.8. 



Mouth: breadth 9.1, 8.75 height 5.2, 5.6. 



Nostrils: distance between inner ends 5.5, 5.3. 



Labial furrow lengths: upper 0.9, 0.8 ; lower 0.8, 0.7. 



Gill opening lengths: ist 4.4, 5.4} 2nd 4.7, 5.7; 3rd 4.8, 5.75 4th 4.8, S-^'') 



5th 4.3, 4.7. 



First dorsal fin: vertical height 9.4, 9.0; length of base lO.o, 9.6. 



Second dorsal fin: vertical height 2.8, 2.9 j length of base 4.8, 4.8. 



Anal fin: vertical height 3.4, 3.4; length of base 5.2, 5.6. 



Caudal fin: upper margin 28.1, 28. 2^ lower anterior margin 1 1.3, 1 1.8. 



^L^J^^AAM^^S^^ 



Figure 51. Afrionoion isodon, female, 504. mm. long, from Texas (U. S. Nat. Mus., No. 1 18457). ^ An- 

 terior part of head from below. B Left-hand nostril, about 2.5 x. C Dermal denticles, about 34 x. D Apical 

 view of dermal denticle, about 68 x. E Left-hand upper and lower teeth, about twice natural size; this figure 

 is inverted by error. F Fourth upper tooth. G Tenth upper tooth. H, I Fourth lower tooth. J Sixth lower tooth. 

 F-J, about 4 X. 



