Fishes of the Western North Atlantic 539 



series of many short 

 waves; sides grey- 

 ish without dark 

 markings. 



lemures Whitley 

 1939.76 



Great Australian 

 Bight, ofF southwe- 

 stern Australia, 80— 

 320 fathoms. 

 I b. Upper margin of second dorsal so deeply notched that anterior rayed portion is 

 entirely separated from posterior rayed portion. media Garman 191 1. 



Locality unknown." 



Hydrolagus af finis (Brito Capello) 1867 



Deep-water Chimaera 



Figure 121 



Study Material. Female, 973 mm long to origin of upper caudal fin, from Banque- 

 reau Bank off eastern Nova Scotia, in Museum of Comparative Zoology, and male, 

 797 mm, from same locality, in U. S. National Museum. 



Distinctive Characters. The only North Atlantic fishes with which H. affinis might 

 be confused are Chimaera monstrosa (p. 526), C. cubana (p. 527) and Hydrolagus alberti 

 (p. 545). It is easily separable from the first two of these in that it lacks a separate anal 

 fin, that the tip of its pectoral fin, when laid back, does not overlap the origin of the 

 pelvic fin, that it has only a short caudal filament, and that it is dark brown in color 

 with its abdomen no paler than its sides or back. Its short caudal filament and short 

 pectorals also mark it off from Hydrolagus alberti. 



Description. Proportional dimensions in per cent of distance between snout and 

 origin of upper caudal fin. Male, 797 mm long to origin of upper caudal, from Banque- 

 reau Bank off Nova Scotia (U. S.Nat. Mus., No. 38021). Female, 973 mm, also from 

 Banquereau Bank (Harv. Mus. Comp. Zool., No. 818). 



Trunk: breadth 9.0, 10.3; height 19.4, 19.5. 



Snout length in front of : eye 9.7, 10.8; mouth 10. o, 9.6. 



Eye: horizontal diameter 5.1, 4.8; vertical diameter 4.4, 3.6. 



Mouth: breadth 5.7, ^.o. 



Nostrils: distance between — , 0.2. 



Dorsal spine: length 15.7, — . 



First dorsal fin: length of base to lowest point between dorsals 20.0, 18.3. 



76. Aust. Zool., 9, 1939: 261, pi. 23, fig. 2; Fish. Aust., j, 1940: 236, fig. 272. 



77. A female and an adult male, on which Garman based his description (Mem. Harv. Mus. comp. Zool., 40, 191 1: 

 91) are still in excellent condition, though received at the Museum at some time before 1872. There is no record 

 of their source. 



