218 EXPEDITION OF THE " ALliATKOSS," 1899-1900. 



range from this point almost directly south to tho Maniuesas Islands, as is 

 shown by the following list of stations: 



Lat. N. 17° 3-2' Long. W. i:):." 40' 



10° 57' 35" 1370 35' 25" 



3° 2S' 136° 51' 



1° 45' 1370 3li' 



Marquesas Islands (approximately) Lat. S. 9° Long. W. 13!)° 45' 



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

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

 series. For comparison with the extensive Hawaiian collections previously 

 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 ca.ses, 9 in 23 cases, 10 in 2 cases ; 

 postero-anals, 5 in 21 cases, 6 in 13 ca.ses; 8+5 occurs in 4 cases, 8 + G 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 '^ ;?; 5 (5 t r H "^ ? thus aver- 

 ' ° 18 + b, to + 5, (8 + 5, 



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



Hawaiian Lslands. 



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



other. 



Myctophum evermanni Gilheut. 



IJull. U. S. Fish Com., 1005, 23, p. 5!i7, 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 diiferences are evident in the southern 

 specimens, so far as the limited material is adequate to determine that ]ioint. 

 The usual number of anal photophores is 8 + 5, which t)ccurs bilaterally in 



