EXPLANATION OF TERMS. 



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

 accompanying table of explanations. The names previously proposed by Dr. Rarl'aele (Hillheilunyen aus 

 der zoologxschen Station cm Nieapel, ix, 1889, p. 181, PI. vn) and by Dr. Liitkeu (Memoirat d< I' Academic Royale 

 ilrs Sciences el des Lettres de Ham-murk, Copenhagut , 6' serie, Claase den Sciences vn, 1892, p. 234, tigure) are given 

 in parallel columns. 



< Inly the latent! (three groups), unul, and caudal photophorea appear to have any special value in the 

 Separation of closely allied species. 



NOMENCLATURE OF rilOTOPHORES. 



GOODE. 



AO. Anteorbital. 

 So. Suborbital. 



M. Mandibular. 



< >. Opercular. 



P. Pectoral. 

 AL. Anterolateral. 

 ML. Mediolateral. 

 PL. Posterolateral. 



T. Thoracic. 



V. Ventral. 



A. Anal (or supcranal). 



C. Caudal. 

 SC. Supcieaudal. 



RAFFAEI.E. 



Preorbitali. 



Preoperculari. 



Brancbiali. 



Laterali. 



Do. 



Do. 

 Ventrali. 

 Ventrali. 

 Anali. 

 Post-anali. 

 Codali. 



Mandibulares. 



Operculares. 



Pectorales. 



Supraventrales. 



Supra-analcs. 



Posterolaterales. 



Thoracici. 



Ventrales. 



Anales anteriores. 



Anales posteriores. 



Caudales. 



