ABT. 10 NOTES ON MYCTOPHINE FISHES PARR 13 



LAMPANYCTUS WARMINGI Lutken, 1892 



Soopclus {Nyctophus) ivar-mingi Lutken, 1892&. 



Lampanyctus warmmgi Paer, 1928 (with earlier synonymy). 



Myctophum toicnsendi Eigenmann and Eigenmann, 1889. 



Lampanyctus townsendi Parr, 1928 (with earlier synonymy) ; Fowler, 1928. 



Material investigated. Type lot of Myctophum toiunsendi Eig- 

 enmann and Eigenmann, 1889, No. 41921, U.S.N.M., from Cortez 

 Banks, California. 



The largest specimen of the sample of Myctophum townsendi^ the 

 only one which is still legible, is in every respect perfectly concordant 

 with the Atlantic specimens of L. wurmingi Lutken (see Taaning, 

 1928, p. 65, and Parr, 1928, p. 91), both with regard to proportions, 

 photophores, and luminous scales. The latter are found in the 

 same, characteristic arrangement as in L. warmingi in a single mid- 

 ventral series between ventral fins and the vent, ending in a symmetri- 

 cal pair, one on each side of the anal opening, (see also Gilbert, 1913, 

 p. 99). A group of luminous scales below the throat, now lost in 

 the type, has also been described by Gilbert (1913, p. 99). There is 

 a whitish patch above the eye, preserved in a bad condition, only on 

 one side, which may be an artefact or might possibly represent a lum- 

 inous tissue, similar to the presumably luminous patches found in 

 the same position in L. photothorax Parr, 1928. This feature is, 

 however, of a highly questionable nature and taxonomic value, and 

 the investigated lot shows no adequate reason at all for regarding 

 L. townsendi as a distinct species from L. warmingi. 



LAMPANYCTUS MARGARITIFER Goode and Bean. 1895 



Notoscopclus margaritifer Goode and Bean, 1895. 

 Macrostoma margaritiferum Jordan and Evermann, 1896. 

 Myctophum (Lampanyctus) margaritiferum Braueb, 1906. 

 Lampanyctus margaritifer Parr, 1928. 



Material investigated. Type specimen No. 43775, U.S.N.M. From 

 the northwestern Atlantic. 



The original figure of this species (Goode and Bean, 1895, fig. 98, 

 pi. 26) apparently renders a fairly accurate picture of the arrange- 

 ment of the photophores, being generally correct in as far as it is 

 now possible to check up on the type-specimen. The only obvious 

 difference worth mentioning is contributed by the fact that 5 VO 

 in a straight series are found in the type, while only 4 of these 

 organs are shown in the figure. The upper PVO has now become 

 lost on both sides, but is shown above the base of the pectoral fin in 

 Goode and Bean's drawing. 



Correctly defined in the previously rendered key. 



Known only from the Newfoundland Banks. 



