278 



THE VOYAGE OF H.M.S. CHALLENGER. 



CONTENTS. 



I. HISTORICAL INTRODUCTION, 



IL THE DIVERSITY OF THE PHOSPHORESCENT ORGANS, . . . . 



Ill SPECIAL DESCRIPTION OF THE DIFFERENT KINDS OF PHOSPHORESCENT 

 ORGANS, 



A. Regular Ocellar Organs, ..... 



1. Simple oeellar organs without pigment coat, sunk in the body, 



a. Distrihvtion, 

 h. Structure, 

 <:. Innervation, 



d. Function, 



e. Develojnnent, 



2. Simple oceUar organs with pigment coat, sunk in the body, 



a. Distribution, 



h. Structure, , 



<:. Innervation, 



d. Function, 



e. Development, 



3. Composite oceUar organs without reflector, 



a. Distribution, 



h. Structure, 



c. Innervation, 



d. Function, 



e. Development, 



4. Composite oceUar organs with special reflector, 



a. Distribution, 



b. Structure, 



a. General, 



(1) The organs of Gorwstoma, 



(2) TJie dorsal organs or " stern-chasers" of Scopelus, 



(3) The groups of lateral organs in Argyropeleciis and Sternoptyx, 



(4) The ventral roivs of Argi/ropeleeiis and Sternoptyx, 

 ji. Histology, ...... 



c. Innervation, 



d. Function, ...... 



e. Development, ...... 



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