26 The Ottawa Naturalist. [April 



(22) Hemlock Lake, New Edinburgh, east of Ottawa, 

 Ontario. Collected by H. M. Ami, 1881 : 



1. Valvata tricarinata. 9. LimnEea desidiosa. 



2. Amnicola porata. 10. Mesodon albolabris. 



3. Physa heterostropha. ii. Mesodon albolabris vat dentifera. 



4. Planorbis campanulatus. 12. Mesodon Sayi. 



5. Planorbis bicarinatus. 13. Patula alternata. 



6. Planorbis parvus. 14. Hyalina indentata. 



7. Limnasa gall:)ana, Binney. An extinct 15. Hyalima arborca. 



species. 16. Conulus fulvus. 



8. Limnsea stagnalis. I'f. Pisidium abditum. 



These shells are found imbedded in a soft white calcareo- 

 argillaceous matrix which has been utilized in the manufacture 

 of white brick in the Ottawa Valley. 



THE LATE PROFESSOR GEORGES VILLE. 



It is with sincere regret that we chronicle the death of 

 Professor Georges Ville, which resulted from heart disease on 

 the 22nd February last at his home in the Jardin des Plantes 

 Paris. 



Professor Ville's life-work was the study of problems in 

 vegetable physiology as applied to agriculture, and the success 

 that attended his scientific invej:tigations — and his no less scien- 

 tific and eminently practical teachings — have made his name to 

 be honorably known and revered, not only in his native country 

 but throughout the civilized world. 



Agriculture, during the past quarter of a century, has ad- 

 vanced greatly ; it may now rank with the sciences. This has 

 been due to such men as Ville — men naturally endowed with 

 the qualities of observation and research and whose minds and 

 methods have been trained by years of careful work under the 

 guidance of scientific principles. Georges Ville was at once 

 strictly scientific and truly practical, and it was for that reason 



