EDITORIAL NOTE. 
A short time ago Professor Giard placed two specimens of the rare 
Cephalopod Spirula in the hands of Dr Paul Pelseneer for anatomical 
examination. From a study of these specimens, and with the assistance 
of Mr Huxley’s figures and notes, Dr Pelseneer has been able to prepare the 
following important Report. 
The figures contained in the six plates which illustrate this Memoir 
are copies of the drawings made by Mr Huxley in the course of his 
examination of the Challenger specimen of Spirula, and of that kindly lent 
him by Mr Agassiz. 
Finding himself unable to carry out the work he had taken in hand to 
his satisfaction, Mr Huxley placed the plates at Dr Pelseneer’s disposal, 
and gladly supplied him with such information as it was in his power 
to give. 
Although Mr Huxley thinks that Dr Pelseneer has really been the sole 
author of the Memoir, he has, at Dr Pelseneer’s desire, allowed his name to 
appear in the title. 
This Report forms the eighty-third and last Part of the Zoological Series 
of Reports on the Scientific Results of the Expedition, and, owing to the 
delay in its preparation, could not be issued in one of the Zoological volumes. 
The manuscript in French was received by me from Dr Paul Pelseneer 
in January 1894, and was translated into English by Miss Annie Sclater. 
John Murray. 
Challenger Office, 
45 Frederick Street, Edinburgh, 
November 1894. 
