Fishes of the Western North Atlantic 



483 



First dorsal fin: vertical height 3.9, 4.O5 length of base 9.8, 12. i. 



Second dorsal fin: vertical height 5.3, S-S'y length of base 1 1.2, i i.o. 



Caudal fin: upper margin 24.2, 20.9; lower anterior margin 13. i, 1 1.8. 



Pectoral fin: extreme length 9.7, 10.6 j extreme breadth 5.5, 5.8. 



Distance from snout to: ist dorsal 30.5, 27.2; 2nd dorsal 58.6, 58.O; upper caudal 



75.8, 79.1; pectoral 18.8, 21.3; pelvics 54.7, 55.3. 



Interspace between: ist and 2nd dorsals 1 8.0, 19.5; 2nd dorsal and caudal 7.8, 8.8. 



Distance from origin to origin of: pectoral and pelvics 35.2, 35.7; pelvics and 



caudal 18.3, 22.0. 







J 



Figure 91. Centroscyllium jabricii, female, 640 mm. long, from 240 miles ESE. of Boston Lightship (Harv. 

 Mus. Comp. Zool., No. 35702). A Head from below, about 0.3 x natural size. B First to fifth upper teeth, 

 right-hand side. C Twentieth to twenty-second upper teeth. D First to fifth lower teeth. E Sixteenth to 

 eighteenth lower teeth. F Twenty-sixth lower tooth. B-F, about 5.4 x. G Dermal denticles, about 10 x. 

 H Lateral and apical oblique views of denticle, about 20 x. 



Trunk slender, its height at ist dorsal only a little more than Ve its length to origin 

 of caudal. Body sector to cloaca about 1.8 times as long as tail sector, without mid-dorsal 

 ridge. Caudal peduncle without longitudinal ridges or precaudal pits either above or below. 

 Dermal denticles minute and very widely spaced, leaving most of the skin bare, on irregu- 

 larly stellate bases, thorn-like and more or less recurved on the trunk generally, somewhat 

 widest on the tail, those on top of head conical. Skin along upper sides and on top of head 



