8 PROCEEDINGS OF THE NATIONAL MUSEUM vol.76 



line ; while in the material obtained by the Bingham Oceanographic 

 Expedition to the Bahamas, 1927, the PLO is considerably closer to 

 the base of pectoral fin than to the lateral line, and the last Pre is 

 always directly in the end of the lateral line. In the author's opinion 

 these differences are not sufficiently significant to justify the intro- 

 duction of an entirely separate species but a subspecific designation of 

 the Atlantic form seems desirable. 



The two PVO are in both forms arranged in an only very slightly 

 inclined, nearly horizontal series. 



Fowler, 1928 (p. TO) still includes M. flhulatmn among the syno- 

 nyms of M. pterotum Alcock, without giving any reasons for not 

 accepting the arguments rendered by Gilbert 1913 (p. 81) for the 

 distinctness of these two species. 



M. fibulatvmi fl)ulatimi has only been recorded with reliable identi- 

 fication from Hawaiian waters. 



MYCTOPHUM FIBULATUM PROXIMUM, new subspecies 



Myctophum fibulatiwi Park, 1928. 



Type specimen, No. 2184 Bingham Oceanographic Collection. 

 Paratype deposited in the United States National Museum. 



Distinct from M. fibulatwn fibidatwii by having the PLO nearer 

 the base of pectoral fin than to the lateral line, and by having the 

 last Pro directly in the end of the lateral line, as above described. 



For illustration and further details see Parr, 1928 (pp. 67-69, and 

 fig. 7). The anterior PVO is shown in a somewhat too low position 

 in the figure. 



Known only from the Tongue of the Ocean, Bahamas. 



The species M. fibvlatwrn as a whole has been correctly defined in 

 the previously rendered key. 



MYCTOPHUM ANDREAE Liitken, 1892 



Scopelus (Rhinoscopelus) andreae Lutken, 1892. 



Rhinoscopelus andreae Goode and Bean, 1895 ; Jordan and Evermann, 1896. 



Myctophum coccoi andreae Braxjer, 1904. 



Myctophum andreae Braxjer, 1906, Zugmaye21, 1911. 



Centrobranchus andreae Gilbert, 1911 ; Fowler, 1928. 



Centrobranchus gracilicaudus Gilbert, 1905 ; Jordan and Jordan, 1922. 



Myctophum nigro-ocellatum (part) Parr, 1928. 



Material investigated. Type specimen of Centrohranchus graci- 

 licaudus Gilbert, No. 51518 U.S.N.M. Hawaii. 



The type of Centroht^anchus gracilicaudus is in every respect per- 

 fectly concordant with the description and figure of Myctophum 



