254 Memoir Sears Foundation for Marine Research 



"Mustelus asterias (Valmont) or Cynias cams Mitchill," Jordan, Copeia, 49, 1917: 87 (name). 



Doubtful South American References: 



Galeus cani?"^ Berg, An. Mus. nac. B. Aires, (2) 4, 1895: 7 (Argentina, might equally refer to schmitti); 



Lahille, Rev. Mus. paul., 6, 1895: 276 (Argentina, might equally refer to schmitti). 

 Mustelus vulgaris Bassett-Smith, Proc. zool. Soc. Lond., 1899: 468 (Rio de Janeiro, might refer equally to 



schmitti) . 

 Mustelus canis Eigenmann, Rep. Princeton Exped. Patagonia (i 896-1899), 3 (2), 1910: 377 (La Plata R., 



might equally refer to schmitti) ; Gilbert, Proc. Wash. Acad. Sci., 2, 1 900: 161 (Maceio, Brazil, might 



equally refer to schmitti); Schreiner and Ribeiro, Arch. Mus. nac. Rio de J., 12, 1903: 78 (Rio de 



Janeiro, might equally apply to schmitti); Evermann and Kendall, Proc. U.S. nat. Mus., 31, 1906: 68 



(Rio de la Plata, might equally refer to schmitti) ; Puyo, Bull. Soc. Hist. nat. Toulouse, yo, 1936: 89 



(French Guiana, name only; might equally refer to norrisi). 

 Mustelus laevis Schreiner and Ribeiro, Arch. Mus. nac, Rio de J., 12, 1 903 : 78 (Rio de Janeiro, might equally 



refer to schmitti). 

 Cj/mW cawjV Ribeiro, Arch. Mus. nac, Rio de J., 14, 1907: 161, 203 (Brazil, might equally apply to jcA»j»«») ; 



Fauna brasil. Peixes, Mus. nac. Rio de J., 2 (i), Fasc. I, 1923: 19, pi. I (Brazil, might equally refer to 



schmitti) . 

 Mustelus mustelus Fowler, Copeia, 39, 1917: 4 (Argentina, might equally apply to schmitti) ; Proc. Acad. nat. 



Sci. Philad., y8, 1926: 261 (Argentina, might equally refer to schmitti). 

 Mustelus asterias Lahille, Enum. Feces Cartilag. Argent., 1921: 13 (Argentina, name only); probably not 



asterias Cloquet, 1 819, of the eastern North Atlantic. 



Mustelus norrisi Springer, 1939 



Florida Dogfish 



Figure 43 D-F 



Study Material. Three males, 677 to 825 mm, long, taken near Englewood, western 

 Florida (Harv. Mus. Comp. Zool., No. 35222, 35223, 35224) ; one male, 623 mm., from 

 the Florida Keys. 



Distinctive Characters. Among Atlantic members of the genus, the most distinctive 

 feature of M. norrisi is the expansion of the lower anterior corner of its caudal as a sharp- 

 pointed lobe directed rearward (Fig. 43 D). 



Description. Proportional dimensions in per cent of total length. Male, 671 mm., 

 from Englewood, Florida (Harv. Mus. Comp. Zool., No. 35223). Male, 753 mm., from 

 same locality (Harv. Mus. Comp. Zool., paratype. No. 35222). 



Trunk at origin of -pectoral: hrezdth 9.1, 8.55 height 8.2, 8.0. 



Snout length in front of: outer nostrils 3.4, 3.25 mouth 6.1, 5.9. 



Eye: horizontal diameter 2.6, 2.6. 



Mouth: breadth 4.4, 4.25 height 3.1, 3.2. 



Nostrils: distance between inner ends 2.S,i.s. 



Labial furrow length: upper 1.3, i.2j lower i.i, i.i. 



Gill opening lengths: ist 1.9, 1.65 2nd 2.1, 1.75 3rd 2.1, 1.9J 4th 2.1, 1.95 5th 



1.7,1.5. 



32. Galeus canis Lahille (Physis, B. Aires, 5, 1921: 63), Marini (Physis, B. Aires, 9, 1929: 452), and Pozzi and 

 Bordale (An. Soc. cient. argent., 120, 1935: 151) reported for Argentina appears to refer not to a Mustelus 

 but to the genus Galeorhinus ; see p. 264. 



