Fishes of the Western North Atlantic 535 



2 a. Tip of pectoral fin not reaching beyond origin of pelvics when laid back. 

 3a. Pectoral fins reaching nearly to origin of pelvic fins when laid back; 

 height of second dorsal at midlength not more than Vs as great as length 

 of anterior margin of first dorsal; apex of first dorsal angular; cranial 

 mucous canal on each side without a downward wave close in front of 

 level of front of eye; jugular and joint oral-angular canals extending 

 downward as a single trunk for some distance from the point where they 

 meet orbital canal (Fig. 121). affinis (Brito Capello) 1867, p. 539. 



3 b. Pectoral fins falling considerably short of origin of pelvic fins when laid 

 back; height of second dorsal at midlength about V4 as great as length 

 of anterior margin of first dorsal; apex of first dorsal rounded; cranial 

 mucous canal on each side with a pronounced downward wave close in 

 front of level of front of eye; jugular and joint oral-angular canals diverging 

 at once from point where they depart from orbital canal. 



eidolon Jordan and Hubbs 1925.*' 



Japan. 



2 b. Tip of pectoral fin reaching beyond origin of pelvic fins when laid back. 



4 a. Pectoral fin considerably shorter than head from tip of snout to gill 



opening. waitei Fowler 1908.** 



Victoria, Australia. 

 4 b. Pectoral fin considerably longer than head from tip of snout to gill 

 opening. 



5 a. Dorsal spine considerably longer than distance from tip of snout 

 to origin of pectoral fins. africanus (Gilchrist) 1922." 



Natal Coast, South Africa, to Cape 

 of Good Hope. 

 5 b. Dorsal spine not longer than distance from tip of snout to origin 

 of pectoral fins. 



6 a. Second dorsal fin with upper margin deeply concave, its 

 height at midlength only half as great as height at anterior 

 end, or less. 



7 a. Lower surface white, ground tint of sides silvery, the 

 back brown with whitish spots. 



colliei (Lay and Bennett) 1839.** 

 Pacific Coast of North America, from En- 

 senada, Lower California to western Alaska 

 (see p. 535, footnote 68). 

 7 b. Lower surface dark brown or blackish, as dark as sides 

 and back. 



65. Mem. Carneg. Mus., 10, 1925: 117, pi. 5, fig. i. 66. Proc. Acad. nat. Sci. Philad., sg, 1908: 419. 



67. Fish. Mar. biol. Surv. S. Afr., Rep. 2, Spec. Rep. 3 (1921), 1922: 31, pi. 8, as Chimaera africana; Smith, Sea Fish. 

 S. Afr., 1949: 76. 



68. The original illustration by Lay and Bennett (Zool. Beechey's Voy., 1839: Fishes, 71, pi. 23, figs, i, 2) is excellent, 

 except that the clasper is shown as trifid, apparently as the result of mutilation. For more recent colored illustrations, 

 see Dean (Chimaeroid Fishes, Publ. Carneg. Instn., 32, 1906: pi. lo [young], pi. 11 [partly grown female]). 



