20 Mr. A. H. Hassall on the Anatomy and Physiology 



attacks, which increased until his death. He was never perfectly 

 well after 1835, and his strength was so much exhausted that the 

 progress of the di'opsy, which from the month of June rapidly in- 

 creased, could no longer be opposed with effect. He died at six 

 o'clock in the evening of the 9th of September [1841], having lost 

 his consciousness several hours earlier. 



By his will of the 20th of February of the present year [1841] 

 he left his library and his collection of plants to his son, with the 

 condition that they shovdd be open, as before, to the inspection of 

 botanists, as if in a public establishment, and that students should 

 have the use of them until the end of their term of study. The 

 filial devotion of the son has made the fulfilment of these condi- 

 tions a sacred duty. Many distinguished botanists have promised 

 their aid for the completion of a work which transcends the pow- 

 ers of any individual. DeCandolle bequeathed to the Society of 

 Natm-al History of Geneva the sum of 2400 francs, the interest 

 of which is to be distributed in prizes for botanical monographs. 

 The right of publishing new editions of his ' Theorie Elementaire' 

 and of his ' Organographie,' he left to his friend and scholar 

 Guillemin* in Paris; the same right with regard to the 'Flore 

 Fran9aise ' and the ' Essai sm' les Proprietes Medicales des 

 Plantes,' he bequeathed to Prof. Dunal in Montpelier. 



This is the image, in its essential features, of one of the most 

 excellent men which the century has presented to receive the ho- 

 noiu"s of science. In botany, that Candolle a, the Australian shrub 

 to which Labillardiere has affixed his name, is not required to 

 keep him fresh in the memory of his botanical associates : he has 

 inscribed his own name on every page of the system of plants. 

 Neither does posterity requii-e the monument which his native 

 city proposes to erect to his memory, nor the new " Rue DeCan- 

 dolle" next to the botanical garden in Rochelle, in order to say 

 how great has been the influence of DeCandolle in om* time. 

 Exegit monumentum ai'e perennius. 



II. — Observations on some Points in the Anatomy and Physiology 

 of the Freshwater Alga. By Arthur Hill Hassall, Esq. 



[With a Plate.] 



On Cytoblasts in the Alga. — From the high development of the 

 cells of many Algse, both marine and freshwater, as well as from 

 their extreme transparency in many species, it might have been 

 supposed that the first discovery of those curious organs termed 



* [This favourite pupil did not live even to commence the undertaking 

 thus committed to his charge : he died early in the spring of 1842. — A. G.] 



