290 GEOEGE JOHN EOMANES 1892 



Cambridge, and yet of late years I have so severed 

 my connection with it. These coals of fire have 

 therefore a heat about them which is all the more 

 gratifying. 



To Professor Ewart. 



This would be a wonderful place for natural history 

 if I were well enough to knock about. 



I get fishermen, however, to bring any marine 

 animals which they know to be rare. There is one 

 fish which I never heard of before, and which seems 

 to me remarkable on account of its curious combi- 

 nations of character, for in all respects it seems to be 

 a large dog-fish, excepting its teeth, which are those 

 of a shark. 



To Professor Poulton. 



New Hotel, Madeira : December 2, 1892. 



My dear Poulton, — I have now read the corre- 

 spondence in ' Nature.' It seems to me that is 



quite absurdly ' aggressive,' even supposing that he 

 proves to be right. But I send this to ask you about 

 the grasshopper letter in last week's ' Nature,' just 

 received here. I have noticed the same thing in 

 grasshoppers, but do not remember to have seen any 

 account of the changes of colour, or mechanism 

 thereof, in them. Do you know if it has ever been 

 worked at ? If not, I might do so here. 



The same question applies to lizards. It seems to 

 me that those here vary their colours to suit those of 

 habitual stations. I remember Bimer read a paper 



