Ixviii PROCEEBINQS OP THE 



on the antheridia of Algae and on Bornetia, as well as tbat on 

 the germination of Gylindrospermum. About this time he estab-^ 

 lished the Natural History Society of Cherbourg, which has done 

 such good service to science. It was here that M. Le Jolis, 

 under his guidance worked out his beautiful treatise on the 

 Laminarice. The climate of Cherbourg, however, had a most in- 

 jurious effect upon his health, and he suffered so severely from 

 asthma that, under medical advice, he felt compelled to seek a 

 southern residence, and, with a view to his favourite studies, he 

 fixed upon Autibes, where upon a dry hill covered only with a 

 few distorted olive-trees he set up his residence. Here he built a 

 villa, and constructed a garden in which every thing which intelli- 

 gence, good taste, and industry could provide were to be found. 

 Every year he made excursions to the sea-side, sometimes in com- 

 pany with Dr. Bornet and sometimes with M. Hiocreux. Almost 

 every one of these visits Avas devoted to a special study. The 

 systematic limits so difficult to be defined of the numberless spe- 

 cies of Polysiplionia and Ectocarpus, the development of Mividaria 

 hullata and Poly ides, the fructification of the Floridecd, and many 

 other subjects were undertaken and satisfactorily determined. 

 The most important joint work of Thuret and Bornet, and the 

 only one which has yet been published relating to the impregna- 

 tion of the Floridece, appeared in 1867. It is known that his 

 prize essay, as it appeared in the ' Annales des Sciences,' was only 

 an extract from his entire observations. It was intended that the 

 latter should be published as soon as the fifty folio plates which 

 were to accompany them were printed. He had also in contem- 

 plation to publish in parts, accompanied by illustrative plates, the 

 observations undertaken jointly by him and Dr, Bornet. His 

 last work, intended for the 'Annales des Sciences,' was an analy- 

 tical key to the genera of JVostocace. Unhappily the publication 

 of these latter works was interrupted by his unexpected death ; 

 but it is hoped and believed that Dr. Bornet, his friend and com- 

 panion for twenty-three years, will complete the publication of 

 these works and carry on Thuret's observations. Thuret's repu- 

 tation attracted many foreign botanists to his residence at An- 

 tibes : Woronin, Famintzin, Janczewski, Farlow (Professor at 

 Cambridge, TJ.S.), Cornu, and others resorted there for guidance 

 and information. 



On the 10th of May in the present year M. Thuret left his 

 home at Autibes in apparently in good health, but died at Nice a 



