Fishes of the Western North Atlantic 



237 



Distinctive Characters. The very short labial furrows of barbouri are enough to sepa- 

 rate it at a glance from all other members of the genus, except from venusta, from which 

 it differs in its strongly tridentate dermal denticles, in the fact that the anterior marginal 

 expansion of its nostril is far in advance of the front of the mouth, and in its teeth. It is not 

 likely to be confused with any other Atlantic shark, being the only member of its genus yet 

 known from this ocean. 



Figure 41. Triakis barbouri, adult male, 283 mm. long, from north coast of Cuba (Harv. Mus. Comp. Zool., 

 No. 36099, type). A Anterior part of head from below. B Pelvic fins with claspers, about I x. C Upper teeth 

 from midsection of jaw, about 15 x. Z) Enlarged tooth from C, about 30 x. E Lower teeth near center of 

 mouth. F Lower teeth near corner of mouth. G Four outermost series of lower teeth. E-G, about I 5 x. // Der- 

 mal denticles, about 25 x. 



Description. Proportional dimensions in per cent of total length. Male, 283 mm., 

 from Cuba (Harv. Mus. Comp. Zool., type. No. 36099). Female, 298 mm., from Cuba 

 (Harv. Mus. Comp. Zool., No. 36151). 



Trunk at origin of pectoral: breadth 9.5, 9.55 height 8.8, 8.4. 



Snout length in front of: outer nostrils 3.5, 3.5; mouth S-^^ 5-4- 



Eye: horizontal diameter 3.9, 4.3. 



Mouth: breadth 7.1, 7.2; height 3.5, 3.3. 



Nostrils: distance between inner ends 2.9, 2.9. 



Labial furrow lengths: upper 0.5, 0.6; lower 0.5, 0.7. 



