CONTENTS 



I. Introduction page 309 



II. Material and methods 



III. Penaeidea: Sergestidae ......... 



1 . The superficial photophores of Sergestes regalis Gordon . 



2. The organs of Pesta (luminous liver tubules) in Sergestes 

 corniculum Kroyer, S. sargassi Ortmann, S. diapontius Bate, 

 and 5. edwardsi Kroyer ....... 



3. The branchial chamber photophores in Sergestes corniculum 

 S. sargassi, S. diapontius, and S. edwardsi 



IV. Caridea: Pandalidae. Parapandalus richardi (Coutiere) . 



1. The liver organs ........ 



2. The pigmented spots on the pleopods .... 



V. Caridea: Hoplophoridae ....... 



1. The photophores of Hoplophorus novae-zealandiae de Man, 

 H. lypus A. Milne-Edwards, and H. grimaldii Coutiere . 



(a) The pleopod photophores of Hoplophorus novae-zea 

 landiae ........ 



{h) The organs on the fifth thoracic limb of Hoplophorus 

 novae-zealandiae .... 



(c) The transverse luminous streak behind the base of the 

 fifth thoracic limb of Hoplophorus grimaldii . 



(d) The carapace photophores of Hoplophorus novae-sea 

 landiae, H. typus, and H. grimaldii 



2. The photophores of Systellaspis affinis (Faxon) and S. debilis 

 (A. Milne-Edwards) .... 



(i) Systellaspis affinis .... 

 (a) The pleopod photophores . 

 {b) The uropod photophores 

 (f ) The transverse streak behind the coxa of the fifth 



thoracic limb ...... 



{d) The photophores on the fifth thoracic limb . 

 {e) The carapace organs ..... 



(/) The pigmented spots on the telson and sixth 



abdominal somite 



(ii) Systellaspis debilis .... 



(a) The pleopod and uropod photophores 

 {b) The photogenic streak behind the fifth thoracic 

 limb ....... 



(c) The photophores on the fifth thoracic limb 



(d) The carapace photophores . 



(e) The photophores on the telson 



VI. Discussion 



VII. Summary 



VIII. References 



IX. Plates XXIV-XXVI 



364 

 365 

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367 

 369 

 378 

 380 

 following page 382 



309 

 310 

 310 



314 



320 

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 323 

 327 

 328 



328 

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334 

 337 

 339 



344 

 345 

 346 

 350 



354 

 356 

 360 



361 



363 

 363 



