NUDIBRANCHIATA OF THE L.M.B.C. DISTRICT. 155 



Ancula 1. — Seized at once by crab but eaten very slowly. 

 Pulled to pieces by third maxillipedes, and 

 apparently only some parts eaten. 

 2. — Taken no notice of. 



3. — Taken up by chela, then dropped and left. 

 4. — Apparently not noticed by crabs. 

 The three last specimens of Ancula were found alive and 

 fully expanded next day, and crawled about the two crab 

 tanks undisturbed for some time. 



Finally a few specimens of Ancula were taken to the 

 anemone tank and allowed to drop upon the fully expanded 

 tentacles of a white and a pink Actinoloha diantkus ; they 

 were not sw^allowed in either case, but after lying for some 

 time w^ere allowed to fall off the tentacles. 



In all, then, Ancula was rejected by fifty-three animals 

 and taken by four. These experiments gave us the dis- 

 tinct impression that Ancula was distasteful to the 

 animals tried, although we did not at that time under- 

 stand why and had expected to get a contrary result. 



Deiuironotus arhorescens. 



A. Shanny Tank : — 



Dendronotus 1. — Seized at once by shanny and carried off 

 to back of tank. Shortly afterwards two 

 shannies were found fighting over it, each 

 having hold of an end, as they do wdth a 

 large worm, finally they each ate a part of 

 the Dendronotus. 



B. Flat Fish Tank :— 



Dendronotus 1. — Tried and rejected by brill and young 

 cod. Then seized by plaice and kept in 

 mouth for a long time, during which it was 

 pursued by other fish. 



