180 



from a trip to Europe. Visits were made to the mycologist 

 Bresadola in Trient and to museums and botanical gardens in 

 Paris, Berlin, Copenhagen, Upsala, Stockholm, Leyden, Amster- 

 dam, and Kew. From July 3 i to August 2 he was in attend- 

 ance upon the International Conference on Hybridization and 

 Plant-Breeding, held in London under the auspices of the 

 Royal Horticultural Society. 



The two Walker prizes offered annually by the Boston Society 

 of Natural History for the best memoirs on specially designated 

 subjects connected with natural history are offered for 1907 for 

 memoirs on six subjects, three of which are botanical, as follows : 

 " (i) The structure and affinities of some fossil plant or group of 

 fossil plants. (2) The development of the gametophytes in any 

 little-known representative of the Coniferales. (3) The anatomy 

 and development of some order or group of the angiosperms." 

 The first prize is sixty dollars, which, at the discretion of the com- 

 mittee, may be increased to one hundred dollars, for a memoir of 

 marked merit. Competition is not restricted but is open to all. 

 The manuscript of memoirs submitted must be in the hands of the 

 secretary on or before April i, 1907. P^urther particulars may 

 be had by addressing Glover M. Allen, Secretary, Boston Society 

 of Natural History, Boston, Mass. 



