EXPLANATION OF TKRMS. 



The names proposed for the several groups of photophores are explained by the diagrams and the 

 accompanying table of exjilanations. The names previously proposed by Dr. Ratfaele (Mittlieilttngen aus 

 tier zooloi/ischen Station cii Xtapel, IX, 1889, p. 181, PI. vil) and by Dr. I^iitkeu (Memoires de V Academic Hoi/ale 

 des Sciences et des Lettren dc Duneiiiark, Copenhague, (i'' s(!rie, (.'lasse des Sciences \u, 1892, p. 234, tigure) are given 

 in paralb'l columns. 



Only the latertil (tliree groups), nnni, and caudal photophores appear to have any special value in the 

 separation of closi'ly allii'd species. 



NOMENCLATURE OF rHOTOPHORES. 



GOODK. 



AG. Anteorbital. 

 SO. ,s;aborl)ital. 



M. Mandibular. 



O. Opercular. 



P. Pectoral. 

 AL. Anterolateral. 

 ML. Mediolateral. 

 PL. Posterolateral. 



T. Thoracic. 



V. Ventral. 



A. Anal (or superanal). 



C. Caud.al. 

 S(!. Supcrcaudal. 



RAFFAELE. 



Preorbitali. 



Preoperculari. 



Branchiali. 



Laterali. 



Do. 



Do. 

 Ventrali. 

 Ventrali. 

 Auali. 

 i'ost-anali. 

 Codali. 



Mandibulares. 



Operculares. 



Pectorales. 



Supravtntrales. 



Supra-analt'S. 



Posterolaterales. 



Thoracici. 



Ventrales. 



Anales anteriores. 



Anales posteriores. 



Caudales. 



