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ot sixty years his labours and writings as a botanist, and especially as 

 a mycologist, were continuous. 



The Mollusca were, however, the first objects of Berkeley's study. 

 As a boy he had made a large conchological collection, and had 

 turned his attention to the structure and habits of the animals of 

 British species. His earliest scientific paper was " On new species of 

 Modiola and Serpula" published in the ' Zoological Journal,' for 1828. 

 It was followed by " On the internal structure of Helicolimax 

 Lamarckii ;" " On Dentalium subulatuw" " On the Animals of Voluta 

 and Assiminia ;" all in the same journal (1832-1834) ; and " On 

 British Serpulse," and " Dreissena golymoripha" in the ' Magazine of 

 Natural History ' (1834-6). 



At Margate Berkeley's attention was naturally directed to the 

 study of marine Algse, and in 1833 he brought out his ' Gleanings of 

 British Algae,' a work devoted to the more obscure and little known 

 species. 



In 1836, at the request of the late Sir W. Hooker, Mr. Berkeley 

 undertook the formidable task of systematizing the British Fungi for 

 that author's 'British Flora.' This was a work of great research 

 and labour, which had never before been attempted with any 

 approach to completion. The " Sy sterna Fungorum " of the illus- 

 trious Swedish mycologist, Professor Fries, was adopted in it, and 

 carried out with many additions and improvements. In 1857 

 appeared his ' Introduction to Cryptogamic Botany,' which remained 

 the only standard work of the kind in the English language till the 

 publication last year of Bennett and Murray's 1 Handbook.' It was 

 followed in 1860 by his ' Outlines of British Fungology,' and in 1863 

 by the ' Handbook of British Mosses.' 



In 1846 Mr. Berkeley commenced his study of the potato murrain, 

 then ravaging our crops. The result was the first complete account 

 of its cause, the Peronospora infestans, of which he traced the life 

 history, with the result of demonstrating that the ravages of the 

 disease may be greatly mitigated by early planting and harvesting. 

 In 1847 he undertook a similar investigation of the grape mildew, 

 which he named Oidium Tucheri. These were followed by researches 

 on the fungoid diseases of the wheat, cabbage, coffee, hop, pear, 

 and onion, terminating with one on the tomato disease, which 

 appeared in 1884. It is not too much to say that this country and 

 our colonies are largely indebted to Mr. Berkeley's researches and 

 recommendations for the successful cultivation of their crops. 



The kindred subject of vegetable pathology next engaged 

 Berkeley's attention. It was virgin soil, and a series of admirable 

 papers on the subject which appeared in the ' Gardener's Chronicle ' 

 between 1854 and 1857 are the foundations of our knowledge of 

 this most difficult and important subject. They were followed by 



