236 Memoir Sears Foundation for Marine Research 



lb. Origin of 2nd dorsal considerably anterior to origin of anal, its tip terminating anterior 

 to tip of latter; labial furrows long, conspicuous. 

 3a. Rear end of base of ist dorsal about over origin of pelvlcs. 



maculata Kner and Steindachner, 1867.'° 

 Peru. 

 3b. Rear end of base of ist dorsal so far in advance of origin of pelvics that its tip is 

 over origin of latter. 



4a. Lower anterior corner of caudal expanded as triangular lobe, with pointed 

 tip J pectoral also pointed, with deeply concave distal margin. 



leucoperiptera Herre, 1923. 

 Philippines. 



4b. Lower anterior corner of caudal rounded and only slightly expanded; pec- 

 toral rounded at tip, its distal margin only weakly concave, or nearly straight. 

 5a. Origin of ist dorsal anterior to inner corner of pectoral, its tip anterior 

 to origin of pelvics; plain colored. henlei Gill, 1862. 



California. 



5b. Origin of ist dorsal over or behind inner corner of pectoral, its tip about 

 over origin of pelvics; back and sides with dark bars, blotches or spots. 

 6a. Caudal about as long as from tip of snout to axil of pectoral; teeth 

 in sides of jaws similar to those in front, tricuspidate, the median 

 cusp straight although directed somewhat obliquely outward. 



jcy///«"'''MullerandHenle, 1841. 

 Japan, Korea, Formosa, China. ^^ 

 6b. Caudal shorter than from tip of snout to axil of pectoral by a dis- 

 tance about equal to that between nostrils; teeth in sides of jaws 

 noticeably unlike those in front, usually with the inner lateral cusp 

 lacking, and the median cusp strongly curved outward. 



semifasciata Girard, 1854. 



Oregon to Magdalena Bay, Lower 

 California. 



Triakis barbouri Bigelow and Schroeder, 1944 



Figure 4 1 



Study Material. About lOO specimens, males and females, 225 to 338 mm. long, 

 including the type, collected off the north coast of Cuba in March 1938 and May 1939 

 by the research ship "Atlantis" (Harv. Mus. Comp. ZooL), 



10. Including nigromactilata Evermann and Radcliffe, 1917 ; nigrotnacu'.ata has sometimes been referred to Mustelus, 

 but our own examination of Peruvian specimens inclines us to follow Garman (Mem. Harv. Mus. comp. ZooL, 

 j6, 1913 : 167) in retaining' it in Triakis where it was placed by its discoverers, its teeth being definitely cuspi- 

 date, though usually with only two cusps, rarely three (see Bigelow and Schroeder, Proc. Boston Soc. nat. Hist., 

 41 [8], 1940: 42S, pi. 17, fi;:. M). 



loa. The original spelling, scylliiim, is emended here to accord with the gender of the Greek noun (aKic) on 

 which the generic name Triakis was based. 



11. Old reports of this species from South Australia probably were not correct; see Whitley (Fish. Aust., /, 1940: 



• ■s). 



