ART. 10 



NOTES ON MYCTOPHINE FISHES PARR 



25 



specimens. 5 VO were found to be present instead of only 4 as de- 

 scribed by Gilbert.-^ 



Correctly defined in the previously rendered key. 



Recorded only from the coast of California. 



LAMPANTCTUS ALATUS Goodc and Bean 



Lampanyctus alatus Goode and Bean, 1895; Jordan and Evebmann, 1896. 



(Not Taaning, 1918,"* and Breder, 1927.=*) 

 Myctoplmn {Lampanyctus) alatum Brauer, 1906 ; Ztjgmayer, 1911 ; Baknabd, 



1925. 

 Lampanycttis pi^eudoalatus Taaning, 1928, Paer, 1928. 



Material investigated. Type sample No. 43769, U.S.N.M. Two 

 specimens from the Gulf of Mexico. 



An inspection of the above two type specimens reveals the identity 

 of Lampanyctus alatus Goode and Bean with L. pseudoalatus Taan- 

 ing, 1928, by the presence of a luminous scale (or a pair of luminous 

 scales) in the adipose dorsal fin as well as by the comparatively high 

 fin counts already previously recorded by Goode and Bean (1895, 

 p. 79). [D 13, A 17-18, as compared with D 11-13, A 14-15 in L. 

 fusillus Johnson (according to Taaning, 1928, p. 66).] The FZ6>'s 

 have, on the other hand, become completely lost in both specimens, 

 and the organ indicated in Goode and Bean's figure (loc. cit., fig. 92, 

 pi. 24) in what might be an approximately normal position for a 

 VLO, evidently gives a somewhat misplaced representation of the 

 elevated fourth PO^ which is well preserved in the specimens, but 

 otherwise not shown in the illustration. This error in the original 

 drawing certainly has given ample justification for the introduction 

 of Taaning's new species L. pseudoalatus^ which, however, must now 

 be included among the synonyms of L. alatus Goode and Bean, as 

 above made out. The existing confusion in the literature makes a 

 complete redescription and a new figure of the species desirable. 



Measurements of type sample of Lampa/)iyctus alatus Goode and Bean, 1895 



No. J,3769 U.8.N.M. 



[In per cent of the total length without caudal fln] 



Total length without caudal fin in mm 



Length of head 



Diameter of eyes 



Length of lower jaw 



Greatest height 



Height of caudal peduncle. i. 



Snout to D 



Snout to V 



Snout to A 



47 



^ The author is indebted to Messrs. B. A. Bean and E. D. Reid, of the division of fishes, 

 United States National Museum, for liindly verifying the correctness of this observation. 



'* L. pusillus Johnson, according to later identification by Taaning (1928, p. 66). 



*" Lampanyctus warmingi Liitken, Myctophum macrochif' Giinther, and Myctophum 

 imitator (Parr) [=M. suiorbitale Gilbert]. 



