I. '08. 67 



Kerville has since drawn my attention to the inaccuracy of 

 this statement, and has very kindly supphed me with further 

 references to the species. 



A. pellucida is of especial interest as being the only species 

 of Acanthephyra, with the exception of .4. dehilis, in which 

 i^hotophores have be^n described, and it is unfortunate that the 

 additional references still leave the validity of the species open 

 to question. 



Periier (1886) mentions .4. pellucida, and attributes it to 

 A. Milne-Edwards, giving a list of the photophores observed, 

 and Filhol in the same year very briefly notices the species on 

 the same authority. Gadeau de Kerville, in his book on 

 luminous animals and plants, repeats Perrier's account of the 

 luminous organs, and a German translation of this passage 

 is quoted by Hansen (1903). Milne-Edwards himself never 

 seems to have published any description of this species ; our 

 information is accordingly limited to Perrier's account, from 

 \^hich all subsequent reference is derived. 



After indicating a few of the characters^ of .4. pellucida, 

 Perrier describes the photophores in the following terms : — 



" et Tanimal pent projeter tout autour de lui 



une vive lumiere a I'aide de tout 1' arsenal d'appareils 

 d'eclairage dont il est pourvu. L' enumeration de ces ap- 

 pareils n'est pas sans interet. Ce sont : — 



1. Le bord anterieur d'lme ecaille, qui protege exterieure- 



ment les yeux. 



2. Une ligne le long du bord externe du tarse de la 5© paire 



de pattes ; une tache ovale a la base interne de ce tarse ; 

 une autre a la base de 1' article qui le precede. 



3. Une tache semblable a la base du 26 article de la 3e et 



de la 4e paire de pattes, et une a la base du tarse de ces 

 pattes. 



4. Une tache longue a la base du dernier article de la der- 



niere paire de pattes-machoires. 



5. Une bande transversale sur la hanche des dernieres 



pattes thoraciques. 



6. Une double ligne de points correspondant a chacun des 



articles du fouet externe des pattes thoraciques et de 

 la lame externe des pattes abdominales. 



7. Une ligne le long du fouet exterieur des petites an- 



tennes ; une ligne continue en arriere, pointillee en 

 avant, parallele au bord inferieur de la carapace et un 

 peu au-dessus de ce bord. 



1 These characters are of very slight value. It is merely stated that 

 the species is very closely allied to A. purpurea, having a long denticu- 

 late rostrum, enormous eves, chelae on the first two pairs of legs, and 

 dorsal spines on the third\ fourth, and fifth abdominal somites, that on 

 the third being the longest. 



E 2 



