218 EXPEDITION OE THE "ALBATROSS," 1899-1900. 



range from this point almost directly south to the Marquesas Islands, as is 

 shown by the following list of stations : 



Lat. N. 17° 32' Long. W. 13.5° 40' 



10° 57' 35" 137° 35' 25" 



3° 28' 136° 54' 



1° 45' 137° 36' 



Marquesas Islands (approximately) Lat. S. 9° Long. \V. 139° 45' 



Throughout this extensive area, the species shows a striking uniformity. 

 The photophores are invariable in number and position, except in the anal 

 series. For comparison with the extensive Hawaiian collections previou.sly 

 reported, we give below the variation in the antero- and postero-anals in the 

 17 specimens of the present collection, the two sides of each specimen being 

 listed separately : Antero-anals, 8 in 9 cases, 9 in 23 cases, 10 in 2 cases ; 

 postero-anals, 5 in 21 cases, 6 in 13 cases; 8+5 occurs in 4 cases, 8 + 6 in 

 5, 9 + 5 in 15, 9 + 6 in 8, 10 + 5 in 2. The three specimens from Lat. N. 10° 57' 



35", Long.W. 137° 35' 25" have the numbers {g + q {s t 5 18 ^ 5 ^'^"^ ^^e*"" 



aging one less than the others in this collection and in that from the 

 Hawaiian Islands. 



In the type of M. nitidulum, the anals are 8 + 5 on one side, 8 + 6 on tlie 

 other. 



Myctophum evermanni Gilbert. 



Bull. U. S. Fish Com., 1905, 23, p. 597, pi 70, fig 2. 



Eleven specimens from the following localities : 



The range is thus extended from the Hawaiian region directly south to 

 beyond the Marquesas Islands. No differences are evident in the southern 

 specimens, so far as the limited material is adequate to deterinine that point. 

 The usual number of anal photophores is 8+5, which occurs bilaterally in 



