Fishes of the Western North Atlantic 



283 



Trunk at origin of pectoral: breadth 9.1, 10.8} height 8.8, 9.8. 



Snout length in front of: outer nostrils 3.8, ; mouth 8.0, 7.8. 



Eye: horizontal diameter 1.4, 1.4. 

 Mouth: breadth 5.4, 5.4; height 3.7, 3.6. 

 Nostrils: distance between inner ends 3.5, 3.3. 



Labial furrow lengths: upper 0.3, . 



Gill opening lengths: ist 1.9, 2.4J 2nd 2.0, 2.95 3rd 2.3, 3.15 4th 2.3, 2.95 5th 



1.8,2.3. 



First dorsal fin: vertical height 7.2, 7.2 j length of base 7.3, 7.7. 



Second dorsal fin: wcrticzlhti^t 3.1, 2.7; length of base 4.4, 4.2. 



Anal fin: vertical height 3.5, 3.1 ; length of base 3.6, 4.0. 



Caudal fin: upper margin 25.5, 25.8; lower anterior margin 12.8, 12. i. 



Pectoral fin: outer margin 23.4, 21.8 j inner margin 4.1, 4.1 ; distal margin 20.2, 



18,0. 



Distance from snout to: ist dorsal 35.5, 35.7; 2nd dorsal 63.7, 62.75 upper caudal 



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Figure 48. Prionace glauca. Teeth of a 6-foot 8-inch specimen from Platts Bank, Gulf of Maine. A Right- 

 hand upper and lower teeth, about 1.3 x. B Third upper tooth. C Seventh upper tooth. D Eleventh upper 

 tooth. E Third lower tooth. F Sixth lower tooth. G Tenth lower tooth. B-G, about 3 x. 



