212 SEPTEMBER. 



tank. Occasionally he relinquished the hold of one 

 claw, and probed the interior in the usual manner, and 

 then resumed his march. I watched the proceedings 

 for an hour or more, when, having other work to do, I 

 left him alone. 



The thought did occur to me Can this delay be 

 intended to make the Adamsia cognizant of what is in 

 contemplation, and to prepare it for the change ? But 

 I dismissed it as unlikely. 



After about an hour's absence I returned to the 

 examination. The Pagurus was comfortably lodged in 

 his new abode, and the old one, which now looked small 

 indeed, lay deserted at some little distance. I eagerly 

 turned the latter over, to see what was the condition of 

 the Adamsia. Lo ! no Adamsia was there; and the 

 Pagurus, presently approaching the front of the tank, 

 I saw, to my great gratification, that the old association 

 was unbroken. There was the Adamsia, with one 

 wing adhering to the lip of the new shell, and apparently 

 the opposite wing also ; but, from the position of the 

 group, this I could not be quite certain of. The situa- 

 tion of the zoophyte was quite normal, the centre 

 immediately below the breast of the Crab, and in con- 

 tact with the inner lip of the shell, while that wing 

 which I could clearly see was creeping round upon the 

 outer lip. 



