THE RADIATING ORGANS OF THE 

 DEEP SEA FISHES. 



1. INTRODUCTION. 



The fishes collected by the " Albatross " in 1891 have been carefully 

 described by Mr. Samuel Garinan ('99). A considerable number of them 

 possess radiating, or, as they were formerly termed, })hosphorescent organs. 

 Mr. Alexander Agassiz was so kind as to place many of these at my disposal 

 and to permit me to study the minute structure of their radiating parts. 

 For this valuable material and his subsequent furtherance of the work, 

 I express my sincerest thanks. The results of the examination of these 

 organs are detailed in this paper. 



The fishes sent to me belong to the following species : — 



Argyropelecus Ijchnus Garinan. 

 Bassozetus nasus Garman. 

 Chauliodus barbatus Garman. 

 Cyclothone acclinidens Garman. 

 Halosaurus radiatus Garman. 

 Idiacanthus antrostomus Gilbert. 

 Ipnops agassizii Garman. 

 Leuciocorus lusciosus Garman. 



Lychnopoles argenteolus Garman. 

 Macrurus caniis Garman. 

 Malthopsis spinulosa Garman. 

 Mixonus caudalis Garman. 

 Myctophum aurolaternatum Garman. 

 Sternoptyx obscura Garman. 

 Stomias hexaaronatus Garman. 



All, with the exception of Mixonus caudalis, were sufficiently preserved in 

 alcohol to allow of the examination of their radiating organs. 



Since Garman did not pay particular attention to these organs, his state- 

 ments concerning their arrangement and number are not always sufficient. 

 This applies to the figures even more than to the descriptions. For this 

 reason the entire fishes are here figured again. 



The minute structure of the organs was studied by means of paraffin 

 and celloidin sections. Various stains were employed. Van Gieson's 

 haematoxylin-picric acid-fuchsin gave the best results. Most of the sections 



