44 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 76 



The great height and very characteristic outline of the steep, even 

 slightly prominent snout has not been clearly shown in the original 

 illustration of this species. (Goode and Bean, 1895, fig. 103, pi. 27.) 



Type specimen from stomach of cod taken on Brown's bank in the 

 Gulf of Maine. 



Correctly defined in the previously rendered key. 



DIAPHUS LUCIDUS Goode and Bean, 1895 



Aethoprora lucida Goode and Bean, 1895. 

 Diaphus lucidus Parr, 1928 (with full snyonymy). 



Material investigated. Type specimen No. 44084, U.S.N.M. 

 There is nothing to add to the discussion of this species already 

 previously rendered by the author. (Parr, 1928, p. 141.) 

 Recorded only from tropical east American waters. 



Figure 21. — Diaphus tanakae Gilbert 

 DIAPHUS TANAKAE Gilbert. 1913 

 Diaphus tanakae Parr, 1928. 



Material investigated. Type specimen No. 74470, U.S.N.M. 



An inspection of the type specimen brings out the fact that the 

 antorbital organs, particularly the upper antorbitals, are propor- 

 tionately so much larger in D. tanakae than in D. prohlematicus 

 Parr (1928, p. 143) that the author feels satisfied that there can be 

 no reason for maintaining any doubt about the distinctness of these 

 two species. The upper antorbitals of D. tanakae are very large, 

 extending mesad to a comparatively short distance from the median 

 ethmoidal crest, each occupying about two-thirds or three-fourths of 

 the distance between the latter and the anterior external margin of 

 the orbit. The lower antorbitals extend to the level of the lower mar- 

 gins of the eyes. 



Gilbert's description is in all other respects perfectly adequate and 

 accurate, and the species has been properly defined in the previously 

 rendered key. 



No illustration of D. tanakae has heretofore been published. 



Known only from Japan. 



