Fishes of the Western North Atlantic 



457 



Trunk at origin of -pectoral: breadth 10.9, 1 1. 1 j height 9.2, 8.8. 

 Snout length in front of : outer nostrils 4.1, 4.0 j mouth 8.9, 8.6. 

 Eye: horizontal diameter 3.5, 3.3. 

 Mouth: breadth 6.9, (>.(>\ height 1,1, i.o. 

 Nostrils: distance between inner ends 3.4, 3.3. 



Labial furrow length from angle of mouth: upper 2.4, 2.2; lower i.i, i.i. 

 Gill Of ening lengths: ist 1.7, 1.7; 2nd 1.6, 1.5; 3rd 1.6, 1.5; 4th 1.7, 1.7; 5th 

 2.1, 2.1. 



First dorsal fin: vertical height 6.0, 5.7; length of base 7.1, 7.4. 

 Second dorsal fin: vertical height 3.8, 3.9 ; length of base 5.4, 6. i . 

 Caudal fin: upper margin 21.3, 20.3; lower anterior margin 10.2, ii.i. 

 Pectoral fin: outer margin 15.6, 15.8; inner margin 7.1, 6.8; distal margin 10. i, 

 II.I. 



Distance from snout to: ist dorsal 33.4, 32.7; 2nd dorsal 63.8, 62.3; upper caudal 

 78.7, 79.7; pectoral 19.2, 18. 2; pelvics 50.7, 51.3. 



Interspace between: ist and 2nd dorsals 23.0, 23.1 ; 2nd dorsal and caudal 10.7, 

 I1.7. 



Distance from origin to origin of: pectoral and pelvics 3 1 .2, 32.7 ; pelvics and cau- 

 dal 28.8, 28.3. 



Figure 88. Squalus acanlhias, illustrated in Fig. 87. A Upper and lower teeth, left-hand side, about 3.5 x. 

 B Third upper and lower teeth, about 4 x. C Dermal denticles of another Massachusetts specimen (Harv. Mus. 

 Comp. Zool., No. 842), about 34 x. 



