NEMATOLAMPAS, A REMARKABLE NEW CEPHALOPOD. 211 



gill. In the posterior part of the pallial chamber between the 

 fins is a large unpaired organ. 



The medio-dorsal length of the mantle is 32 mm., the width of 

 the same II mm. The length of the entire animal exclusive of 

 the tentacles and the filaments of the third arms is about 57 

 mm. The length of the third arm pair is over 70 mm. 



From the above account it will be seen that this small squid 

 possesses no fewer than ninety definitely and symmetrically 

 arranged photogenic organs, and it may well be that there are 

 even others which have escaped my search, as the opacity of the 

 tissues in preserved material in many cases renders their detec- 

 tion difficult. Those which I have been able to make out are 

 shown somew T hat diagrammatically in the accompanying drawing, 

 and also in the following tabular statement : 



Ventral periphery of eyeball 10 



Tip of dorsal arms 2 



Tip of dorso-lateral arms 2 



Ventro-lateral arms 62 + 



Tentacles 4 



Within pallial chamber: 



Anal 2 



Branchial 2 



Abdominal 4 



Posterior extremity of body J2 



Total 90 



No cephalopod heretofore described is at all comparable to 

 this creature excepting the wonderful Thaumatolampas diadema 

 Chun, already mentioned, and the Lycoteuthis jattai of Pfeffer 

 ('oo, p. 161), both of which are now thought by the latter author 

 to be based upon the same species ('08, p. 294). Chun, in the 

 course of his amazing description of the luminous organs of T. 

 diadema, says, "Unter allem, was uns die Tiefseetiere an wunder- 

 vollen Farbungen darbieten, lasst sich nichts auch nur annahernd 

 mit dem fast magischen Kolorit dieser Organe vergleichen. . . . 

 Es war eine Pracht!" But to judge merely from the anatomy of 

 Nematolampas, even Thaumatolampas must be outmarveled in 

 life by this wonderful mollusk from the Kermadecs. 



