432 Obituary — Pierre Joseph Jules Bergeron. 



Freshivater Rhizopoda, of which three volumes have heen already 

 issued. 



John Hopkin son was one of the pioneers in the study of Graptolites 

 and their zonal distribution ; the Geological Magazine (between 

 1870 and 1881) contains a valuable series of papers by him on this 

 subject. He was joint author with Professor C. Lapworth of an 

 important paper ''On the Graptolites of the Arenig and Llandeilo 

 Hocks of St. Davids", published in the Quarterly Journal of the 

 Geological Society (vol. xxxi, pp. 631-72, pis. xxxiii-xxxvii, 1875). 

 He was elected a Fellow of the Geological Society in 1869, and 

 served on the Council from 1884 to 1886. As a member of the 

 Geologists Association he read papers and conducted excursions. 

 He was a Vice-President of the lloyal Microscopical Society, and 

 a Fellow of the Linnean Society (1875) and served on its council 

 (1908 to 1911). He wrote the article on the Geology of Hertford- 

 shire for the Victoria County History (1888), and Hertfordshire 

 Geology for the Jubilee Volume of the Geologists Association. In 

 collaboration with I. Saunders he also wrote the article on the 

 Geology of Bedfordshire. 



The Reports of the British Association contain numerous abstracts 

 of Mr. Hopkinson's geological papers, but the full range of his 

 versatile talents is best seen in the series of Transactions of the 

 Herts Natural History Society, in which he published most useful 

 annual reports from 1876 onwards, on the meteorology of the county 

 with phenological observations, and papers on its land and freshwater 

 mollusca, its birds and insects, on its scientific bibliography, and 

 many other subjects. He was Chairman of the "Watford Field-path 

 Association, which has issued (by Stanford) a useful pocket map of 

 the Watford district for naturalists and ramblers in this pleasant 

 country area. 



In 1877 Mr. Hopkinson married Miss Kate Willshin, daughter of 

 Mr. Thomas Willshin, of Kingsbury, St. Albans. He leaves a widow 

 and two married daughters to lament his loss. His memory 

 will be long held in esteem by a wide circle of friends and 

 acquaintances, who found in him an excellent authority upon all 

 scientific matters in the county, and one ever ready to impart to 

 others the knowledge he had acquired by careful study and trained 

 observation. 



PIERRE JOSEPH JULES BERGERON. 



Boen Died May 27, 1919. 



We regret to record the death of Professor P. J. Jules Bergeron, 

 which occurred at his residence, 157 Boulevard Haussmann, Paris, 

 on May 27 last. He was lately Professor of Geology at the Central 

 School of Arts and Manufactures, President of the Society of Civil 

 Engineers of France, and of the Geological Society of France, and a 

 Chevalier of the Legion of Honour. He contributed numerous 

 papers to the Geological Society of France, and is chiefly known 

 from his work on La Mont ag tie Noire, Cairieres, and Latiguedoe. 



