THE REVISION OF THE ECHINI 103 



Wherever he went, the Museum was never out of his 

 mind ; a little later he writes : " What part of the Mu- 

 seum is going up ? Nobody has said a word about it. I 

 am very sorry I am not there to superintend the putting 

 up. I think what I have seen might have been useful, 

 but I hope it will not be too late as far as internal ar- 

 rangements are concerned, and that we may still profit 

 by what has been done." 



TO MRS. LOUIS AGASSIZ 



Hamburg, June 6, 1870. 



Your first letter from Deerfield came to Berlin the 

 day we were leaving. We made but a flying visit there, 

 still managed in the week we stayed to see a good deal. 

 I spent most of my mornings at the Museum with Dr. 

 Martens looking at the Sea-urchins he had described 

 from Japan. I liked him extremely; he is a capital type 

 of an Assistant, has no specialty and is interested in 

 whatever turns up ; and he manages to keep things in 

 capital order. He knows a great deal too, and he is one 

 of the few men I have seen thus far who have a general 

 knowledge of Zoology. Peters also was very polite to 

 me and I thought him very pleasant. I passed an even- 

 ing at his home where we found Dove, who is an origi- 

 nal, and a type of a German such as I had not seen before. 

 He sent many kind messages to father, as does Peters 

 and Ehrenberg, whom I saw for an hour at his house. 



The Zoological collections of Berlin are excellent and 

 in good order, and the Invertebrates as a whole, spe- 

 cially when taken in connection with those in the An- 

 atomical Department, the best I have seen thus far. 

 Reichert, who has charge of Miiller's collection, is not 

 very careful, and I am sorry to say that many of Miiller's 



