Fishes of the Western North Atlantic 537 



fb. Fold along front of head either nearly straight or at most obtusely rounded 

 opposite corner of mouth (Fig. 103 D-H). 

 6a. Inner nasal barbel broadly spatulate (Fig. 103 D-F). 



7a. Distance from eye to spiracle nearly or quite twice as long as hori- 

 zontal diameter of eye. argentina^" Marini, 1930, p. 544. 

 7b. Distance from eye to spiracle little if any longer than horizontal 

 diameter of eye. 



8a. Distal margin of pectoral nearly straight, its inner corner 

 broadly rounded, its inner margin strongly convex. 



jafonica Bleeker, 1857. 



Japan, Korea. 



8b. Distal margin of pectoral weakly concave, its inner corner sub- 

 angular, its inner margin only slightly convex. 



calif ornka Ayres, 1859. 



Mexico to southern Alaska. 



6b. Inner nasal barbel narrow, tapering (Fig. 103 G, H). 



9a. Distal margin of pectoral marked off from inner margin by a defi- 

 nite, subangular corner. dumeril Lesueur, 1818, p. 538. 

 9b. Distal margin of pectoral not marked off from inner margin by a 

 subangular corner. 



lOa. Distance from anterior corner of pectoral to rear end of its 

 base equals % or more of its length ; posterior margin of lower 

 lobe of caudal, as well as upper, vertically truncate. 



arwtf/fl Philippi, 1887. 

 Chile, Peru." 



lOb. Distance from anterior corner of pectoral to rear end of its 

 base equals only about % of its length j posterior margin of 

 lower lobe of caudal oblique. africana Regan, 1908. 



Natal, South Africa.-* 



20. A specimen from Uruguay which we have examined in the U.S. National Museum is clearly referable to this 

 species, and probably this also applies to the form reported from Rio de Janeiro by Ribeiro (Arch. Mus. nac. Rio 

 de J., 14, 1907: pi. 10; Fauna brasil. Peixes, 2 [i] Fasc. i, 1923: pi. 9) as Squatina squatina. Although the 

 inner corners of its pectorals are shown as angular or subangular (rounded in argentine) , the conformation of the 

 margin of the nostrils agrees with that of argentina, in addition to the fact that the outer corners of the pectorals 

 are much more obtuse than a right angle, and that the eyes and spiracles are far apart. 



21. The original account of this species is not sufficiently detailed to locate it positively in the key. The characters 

 given above are from a specimen from Mejillones Island, Peru (Harv. Mus. Comp. Zool., No. 531), presumably 

 the type of p/iilifpi Garman, 1913, which we believe to be a synonym of armata. 



22. Records under this name from Lagos and Goree in tropical West Africa (Gilchrist and Thompson, Ann. Durban 

 Mus., /, 1 91 6: 284; Metzelaar, Trop. Atlant. Visschen, 1919: 191), and from Cape Blanco, Morocco (Cha- 

 baoaud and Monod, Bull. £tud. Hist. Sci. Afr. Occid. Franc, 1927) do not include evidence sufficient for 

 specific identification. 



