1920-21.] Obituary Notices. 183 
L’Annee biologique, some twenty volumes of which have appeared 
giving critical abstracts of memoirs on general biology. Reference should 
also be made to the Traite de Zoologie concrete, written in collaboration 
with Professor Herouard, the five volumes of which are marked by great 
lucidity of exposition. 
No account of his services to biological science would be complete which 
omitted to record an appreciation of his work for the marine biological 
station at Roscoff, first as assistant-director under Lacaze-Duthiers, and, 
since 1900, as director. In 1908-9 he reconstructed, extended, and re- 
organised the station, and for a generation has been an inspiration to many 
grateful workers there. 
He succeeded Lacaze-Duthiers twenty years ago in the chair of Zoology 
at the Sorbonne, and was in active work there practically to the end of his 
life. For several of the last years an affection of the eyes made him almost 
blind, so that he was unable to carry on himself researches requiring 
delicate technique ; but his intellectual vision remained as keen as ever, 
and younger workers continued to receive freely of his encyclopaedic 
knowledge and his warm encouragement. He was elected an Honorary 
Fellow of the Society on 21st June 1920, and died on 7th October 1920, 
aged sixty-six. 
