THE LANTERN FISHES. 219 



5 specimens and on one side of 3 others ; 9 + 5 occurs bilaterally in 1 

 specimen, 8 + 6 bilaterally in 2 ; 7 + 5 occurs unilaterally in 3 specimens. 

 This species has been compared with specimens of M. humboldti and 

 M. californicnse and is very distinct from both. 



Myctophum reinhardti Lutken. 



Scopelus reinhardtii Lutken, Spolia Atlantica, 1892, 2, p. 257, fig. 16. 

 Myctophum atratum Garman, Mem. Mus. Comp. Zool., 1899, 24, p. 268. 

 Myctophum braueri Cilbert, Bull. U. S. Fish Com., 1905, 23, p. 598, pi. 70, fig. 1; not Mycto- 

 phum (Lampanyctus) braueri Lonnberg, Zobl. Anz., 1905, 28, p. 764. 



Six young specimens from near the equator, Lat. N. 1° 45', Long. W. 

 137' 36'. The anals number 11 to 13 instead of 13 to 15, as in Hawaiian 

 specimens. The following combinations are present : 6 + 7 in 5 cases, 

 6 + 6 in 3, 5 + 8 in 1, 5+7 in 1, 5 + 6 in 2. As in D. spinostis, the 

 southern specimens show a lower average number of photophores, but the 

 limited amount of the material makes the comparison inadequate. The 

 type of M. atratum, from near the entrance to the Gulf of California, was 

 in rather poor condition, so the number of posterior anals could not be 

 determined with certainty. Six can be made out on one side of the type 

 specimen and 5 on the other, but others may have been present in life. 



Liitken's account of M. reinhardti as having 11 dorsal and 16 anal rays 

 and with antero-anal photophores varying from 4 to 7, seemed to indicate 

 a species distinct from this Pacific form. Examination of the two specimens 

 which Lutken designated as types .shows, however, that they represent two 

 very distinct species. The one figured by him, from 34' 22' N. Lat., 18° 10' 

 W. Long., may be considered the type, and has 14 dorsal and 24 anal rays, 

 as in M. atratum. On direct comparison with the latter no important 

 differences appear. Liitken's fin-counts were taken from his second speci- 

 men, which belongs to a species still undescribed. 



