1876 PANGENESIS V. MEDUSA 47 



and can spare it till next autumn, I need not send 

 to Germany for it, remembering what you said when 

 I last saw you. I should also much like to see the 

 other paper of Hackel's about cutting up the ova of 

 Medusae. 



I have an idea that you are afraid I am neglecting 

 Pangenesis for Medusae. If so, I should like to 

 assure you that such is not the case. Last year I 

 gave more time to the former than to the latter 

 inquiry ; and although the results proved very dispro- 

 portionate, this was only due to the fact that the one 

 Hne of work was more difficult than the other. How- 

 ever, I always expected that the first year would 

 require to be spent in breaking up the ground, and I 

 am quite satisfied with the experience which this 

 work has brought me. I confess, however, that but 

 for personal reasons I should have postponed Pan- 

 genesis and worked the Medusae right through in one 

 vear. There is a ghtter about immediate results 

 which is very alluring. 



From C. Darwin to G. J. Bomanes. 



I will send the books off by railway on Monday or 

 Tuesday. Ton may keep that on Medusae until I ask 

 for it, which will probably be never. That on Siphono- 

 phora I should like to have back at some future time. 



So far from thinking that you have neglected 

 Pangenesis, I have been astonished and pleased that 

 your splendid work on the Jelly-fishes did not make 

 you throw every other subject to the dogs. Even if 

 your experiments turn out a failure, I beheve that 



