THE EXPERIMENTAL STUDY OF HEREDITY. 301 



Miss Wheldale is conducting experiments on the chemistry of pig- 

 mentation in plants, in continuation of her work already published. 



Mr. Compton (Gonville and Caius College) is investigating the occur- 

 rence of sterility in the crosses between cultivated peas and a wild form 

 brought from Palestine by Mr. Arthur Sutton. He is also conducting 

 various other breeding experiments. 



Clare Island. — Report of the Committee, consisting of Professor T. 

 Johnson (Chairman), Mr. E. Lloyd Praeger (Secretary), 

 Professor Grenville Cole, Dr. Scharff, and Mr. A. G-. Tansley, 

 appointed to arrange a Botanical, Zoological, and Geological Survey 

 of Clare Island. 



Since the last report was presented, twelve months ago, much work 

 has been carried out on Clare Island and the adjoining mainland as 

 regards both the fauna and the flora. Among the groups that have 

 received special attention are: Sponges, polyzoa, insects (many orders), 

 mollusca (marine and fresh-water), birds, algae (marine and fresh- 

 water), lichens, fungi, mosses, and hepatlcs. In addition, meteorological 

 observations have been commenced ; also the investigation of the peat 

 deposits. The work is going steadily forward, and it is hoped that 

 it will be completed by the end of 1911. As reported in the statement 

 of accounts, the grant made by the British Association will not carry 

 the work through, and further assistance would be very welcome; for 

 the present the Committee are using other funds which they have been 

 successful in procuring. 



The Structure of Fossil Plants. — Report of the Committee, consisting of 

 Dr. D. H. Scott (Chairman), Professor F. W. Oliver (Secretary), 

 Mr. E. A. Newell Arber, and Professors A. C. Seward and 

 F. E. Weiss. 



The amount granted has been fully spent on sections of Stigmaria 

 for the continuation of Professor Weiss 's investigations and on sections 

 of various plants from the roof nodules (which contain a characteristic 

 flora of their own) for Professor Seward. 



Mr. H. H. Thomas has made great progress with his work on the 

 structure 'of the leaf in Palaeozoic plants, referred to in the last report. 

 He has published a preliminary statement ' On the Assimilating Tissues 

 of some Coal Measure Plants ' in the ' Proc. Cambridge Phil. Soc.,' 

 vol. xv., pt. v., 1910, and an extensive paper on the leaves of Cata- 

 mites will shortly be communicated to the Royal Society. 



1910 



