THE RADIATING ORGANS OF THE 

 DEEP SEA FISHES. 



1. INTRODUCTION. 



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

 described by Mr. Samuel Garman ('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 ex.araination of these 

 organs are detailed in this paper. 



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



Argyropelecus Ijcluiiis Garman. Lyclinopoles argenteolus Garman. 



Bas.sozetus nasus Garman. Macnirus canus Garman. 



Chanliodus barbatus Garman. MaUliopsis .spinulosa (iarman. 



Cyclotlionc acclinidons Garman. Mi.xonus caudalis Garman. 



Halosaurus radiatus Garman. Myetophuni aurolaternatum Garman. 



Idiacanthus antrostonius Gilbert. 8tcrnoptyx obscura Garman. 



Ipnops agassizii Garman. Stomias hexagouatus Garman. 

 Leuciocorus lusciosus Garman. 



All, with the exception of Mixoims 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 fi";ured atj-ain. 



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 



