YOUNG CEPHALOPOD WITH PEDUNCULATE EYES. 311 



On Procalistes, a Young Cephalopod with Pedun- 

 culate Eyes, taken by the " Challenger " 

 Expedition. 



By 



E. Ray liankester, H.Am F.R.S., 



Jodrell Professor of Zoology ia University College, Londou. 



[Published by permission of the Lords Commisiouers of the Treasury.] 



Mr. John Murray, the director of the " Challenger " pub- 

 lications has kindly placed in my hands for examination three 

 specimens of a very young Cephalopod — mounted for micro- 

 scopic study — together with a drawing and notes by the late 

 Dr. R. von Willemoes Suhm relating thereto. 



Dr. Suhm's drawing is reproduced in the woodcut^ fig. 1. 

 The following note from his journal refers to these specimens : 



'' 16th June, 1874. — Among the surface gatherings there is 

 a transparent and very interesting Pteropod, with large eyes 

 on the tentacles and without any 'ptera' or foot. Having 

 obtained three more or less damaged specimens from which I 

 could not complete its anatomy, I shall have to defer giving a 

 proper account of it. The animal belongs to the Cliouidte, 

 and is probably allied to Pelagia, Quoy and Gaimard.^^ 



With Suhm's drawing of the animal are the following notes : 



'' Clionid Pteropod : June 16th— 18th, 1874. In the warm 

 East Australian current coming from the north (surface tem- 

 perature 18° C), together with Calcarella on the voyage from 

 Sydney to Wellington, lat. 34° 50' S., long. 155° 28' E. In 

 all only three specimens, of which the largest alone showed 

 the eyes well. It measured 13 mm. long ; tentacles 6 — 7 mm. 

 long; eye-peduncles 2 mm. long. Neither of the smaller 

 specimens showed anything new. Tentacles with suckers, of 



