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THE RADIATING ORGANS OF THE 
DEEP SEA FISHES. 
1. INTRODUCTION. 
Tue fishes 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, phosphorescent 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, 
[ express my sincerest thanks. The results of the examination of these 
organs are detailed in this paper. 
The fishes sent to me belone to the following species : — 
o o 
Argyropelecus lychnus Garman. Lychnopoles argenteolus Garman. 
Bassozetus nasus Garman. Macrurus canus Garman. 
Chauliodus barbatus Garman. Malthopsis spinulosa Garman, 
Jyclothone acclinidens Garman. Mixonus caudalis Garman. 
Halosaurus radiatus Garman. Myctophum aurolaternatum Garman. 
Idiacanthus antrostomus Gilbert. Sternoptyx obscura Garman, 
Ipnops agassizii Garman, Stomias hexagonatus Garman. 
Leuciocorus lusciosus 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 
