ON OTENOPLANA. 323 
On Ctenoplana. 
By 
Arthur Willey, D.Sc. 
With Plate 21. 
Tue discoverer of the remarkable genus Ctenoplana, which 
presents affinities both to the Ctenophora and to the Turbel- 
laria, was, as is well known, Professor Alexis Korotneff, 
who obtained only a single specimen off the west coast of 
Sumatra, and described it in the ‘ Zeitschrift fiir wissenschaft- 
liche Zoologie *! for 1886. 
Korotneff found his specimen drifting in a current of the 
sea, in the company of a large number of Porpita. It was 
distinguished by its deep red or crimson colour, and was 
named C. Kowalevskii in honour of the discoverer of 
Celoplana. 
Since 1886 no second record of the occurrence of the genus 
has been made. 
In January of this year (1896), while cruising among the 
islands which form the Hastern Archipelago of British New 
Guinea, in pursuance of zoological work, I was fortunate 
enough to pick up a cuttle-bone which had evidently been 
afloat for a long time, and was being carried along by the 
current off the group of the islands named on the chart the 
Conflict Group.? On the cuttle-bone were numerous minute 
1 Vol. xliii, pp. 242—251, Taf. viii. 
? These islands surround a magnificent lagoon. 
