1881 DE. EOUX'S BOOK 109 



was on 'Papaver.' Dyer could probably tell you 

 about it. Perhaps your plan is to remove one half of 

 the ovarium of a one-seeded plant and join it on to 

 the ovary of another of a distinct var., with its ovule 

 removed; but this would be a fiightfully difficult 

 operation. 



I am very sorry to hear about your ill success 

 with cats, and I wish you could get some detailed 

 account of the Belgium trials. 



Yours very sincerely, 



C. Daewix. 



AprU 16, 1881. 



My manuscript on Worms has been sent to 

 printers, so I am going to amuse myself by scribbhng 

 to you on a few points ; but you must not waste 

 your time in answering at any length this scribble. 

 Firstly, your letter on inteUigence was very useful 

 to me, and I tore up and rewrote what I sent you. 

 I have not attempted to define intelligence, but have 

 quoted your remarks on experience, and have shown 

 how far they apply to worms. It seems to me, that 

 they must be said to work with some intelhgence, 

 anyhow, they are not guided by a bhnd instinct. 



Secondly, I was greatly interested hj the abstract 

 in ' Xature ' of your work on Echinoderms ; the com- 

 plexity, with simphcity, and with such curious co- 

 ordination of the nervous system, is marvellous ; and 

 you showed me before what splendid gj-mnastic feats 

 they can perform. 



Thirdly, Dr. Eoux has sent me a book just 

 pubhshed by him, 'Der Kampf der Theile,' &c.. 



