LINNEAIf SOCIETT OF LONDON. 37 



same favourite subject of the Copepoda. Just before his deatli 

 he had completed, in partnership with Mr. Andrew Scott, A.L.tS., 

 an important Report upon the Copepoda of the Ceylon Pearl 

 Banks, for Herdman's great work on the Pearl Oyster Fisheries 

 of that island, now in course of publication by the Koyal Society. 



The impression produced by I. C. Thompson on those who met 

 him only at irregidar intervals fully agrees with the opinion 

 expressed by his intimate friend. He seemed to be a man of solid 

 worth, without caprice of temper, uniformly actuated by genuine 

 kindness. His biographer speaks of the large number of men, 

 well qualified to judge, who " liad learned to appreciate, not only 

 his scieutitic Ivnowledge and skill, but also his honest, fearless, 

 upright character and his bright and sympathetic loving nature." 



Michael Wobonin was born at St. Petersburg on July 21st, 1838 ; 

 he came of a wealthy family, and was thus in a position to devote 

 himself wholly to scientific research, for which he early showed a 

 strong inclination, without the necessity of seeking any official post. 

 At the University of St. Petersburg he was a pupil of Cienkowski's, 

 whose infiuence no doubt first attracted him to the study of the 

 lower plants to which his life's work was mainly devoted. When, 

 after taking his degree, he went to Germany, and entered De Bary's 

 laboratory at Fi-eiburg, his career as an investigator began . Woronin 

 was one of the most brilliant of De Bary's disciples, and perhaps 

 followed more closely than any other in the footsteps of his distin- 

 guished teacher, both in method and spirit. Although his first 

 botanical publication was on an anatomical subject (the anomalous 

 stem of Calijmnihus), it was among the Thallophyta that his charac- 

 teristic work was done. Beginning with an investigation of the Si- 

 phoneous Algae Acdabularia and Esijcra, carried out under Thuret 

 at Antibes, Woronin, throughout his life, continued to produce a 

 remarkable series of researches, either alone or in co-operation with 

 others, on Algae, Fungi, and Mycetozoa. Of his algological investi- 

 gations, that on Botnjdium granulatum, published in conjunction 

 with Eostatinski, is perhaps the best known, though not free from 

 error. Among his far more numerous works on Fungi, those 

 on the ChytridiuesB (in co-operation with DeBary), on Ascohohis, 

 on Exobasidhon, on the Ustilaginese (partly in conjunction with 

 Ue Bary), on Pucdnia, and on Sderotinia, in which last Nawaschin 

 was a collaborator, may be mentioned as of fundamental im- 

 portance. His researches on Ceratium (in which he was associated 

 with Famintzin) and on Plasmodiophora are among the most valuable 

 contributions to the life-history of the Mycetozoa. No one has 

 done more than AVoronin, if we except De Bary himself, to 

 advance our knowledge of the groups at which he worked. " Woro- 

 nin's hypha " is a term familiar even to students, and recent 

 researches have tended to emphasize the importance of this organ 

 in relation to fertilization in Ascomycetes. 



