246 SEPTEMBER. 



active promoter of the partnership ; it is abundantly 

 evident that he values the company of his elegant but 

 very heterogeneous associate. These last observations 

 compel the conclusion that the claws of the Crab are 

 always employed . in the transference of the Cloaklet 

 from shell to shell. 1 



But what a series of instincts does this series of facts 

 open to us ! The knowledge by the Crab of the quali- 

 ties of the new shell ; the delay of his own satisfaction 

 till his associate is ready ; the power of communicating 

 the fact to her ; the power in her of apprehending the 

 communication ; her immediate obedience to the inti- 

 mation ; her relinquishment of her wonted hold, which 

 for months at least had never been interrupted ; her 

 simultaneous taking of a new, unwonted hold, where 

 alone it could have been of any use ; the concerted 

 action of both ; the removal ; her relinquishment of the 

 transitory adhesion as soon as its purpose was accom- 

 plished ; her simultaneous grasp of the new shell in the 

 proper places ; all these are wonderful to contemplate, 

 wonderful considered singly, far more wonderful in 

 their cumulation. Is there not here much more 

 than what our modern physiologists are prone to call 



1 These facts were originally published in the Zoologist for 1859 (p. 6580). 

 In the Quarterly Journal of Science for January 1864, some observations 

 of Colonel Stuart Wortley are cited, confirmatory of mine, which, however, 

 are wholly ignored by the Editors. 



