234 



PROCEEDINGS OF THE NATIONAL MUSEUM 



There may be a correlation between this development and the tempera- 

 ture of the water, since specimens in colder waters develop this spot at 

 a shorter length than those found in warmer waters. 



The mean for the number of pectoral rays is 18.52 in C. c. marginatus 

 and 17.03 in C. c. cinereus; the mean for the number of pores in lateral 

 line is 40.23 in C. c. marginatus and 38.39 in C. c. cinereus; and the 

 mean for the character index of pectoral rays plus pores in lateral line 

 is 58.75 in C. c. marginatus and 55.94 in C. c. cinereus (fig. 5). 



Total length in hundred millimeters 

 12 3 4 5 6 7 8 



HAWAII 



MARSHAL LS 



SAMOA 



NEW CALEDONIA 



GUAM 



OKINAWA 



PHILIPPINES 



AFRICA 



RED SEA 





Figure 6. — The relationship of body length with development of black spot on the pectoral 

 fin in Conger cinereus cinereus and C. c. marginatus, by locality. All specimens found in 

 Hawaii are of the subspecies C. c. marginatus, while all the specimens found in the other 

 areas are of the subspecies C. c. cinereus. Lines indicated by short dashes represent 

 pectoral fins all pale; those indicated by short dashes and long dashes represent pectoral 

 fins with traces of black. The solid line represents the black spot fully developed. 



Also, C. c. cinereus differs from C. c. marginatiis in that the former 

 has the origin of dorsal fin situated slightly more anteriorly (table 1) 

 and the length of the head is slightly shorter (fig. 5) . 



Conger cinereus cinereus Kuppell 



Figures 4-6; Plate 2 



Conger cinereus Riippell, 1828, p. 115 (type locality, Red Sea). — Klunzinger, 

 1871, p. 607.— Weber, 1913, p. 43.— Weber and de Beaufort, 1916, p. 258.— 

 Jordan and Hubbs, 1925, p. 193.— Barnard, 1925, p. 187 (Natal coast).— 

 Schultz, 1943, p. 44 (Phoenix and Samoan Islands). — Aoyagi, 1943, p. 6, 

 fig. 1.— J. L. B. Smith, 1949, p. 393, pi. 99, fig. 1111. 



Conger aliipinnis Kaup, 1856a, p. 72 (type locality. Isle of Bourbon). — Kaup, 

 1856b, p. 114.— Playfair and Gunther, 1866, p. 125. 



