PROCEEDINGS, 1911, PART 4. 



CONTENTS. 



PAGES 

 Contributions to our Knowledge of Soil-Fertility. iii.Bacter ial 

 Slimes in Soil. By R. Greig-Smith, D.Sc, Macleay Bacte- 

 riologist to the Society ... ... ... ... ... ... 609-612 



The Fibro-vasoular System of the Apple[Pome], and its Functions. 



By D. McAlpine, Corresponding Member. (Plates xxi.-xxv.) 613 625 



The Gases present in the FIoats[Vesicles] of Certain Marine Algte. 



By A. H. S. Lucas, M.A., B.Sc 626-631 



On a Collection of Parasitic H-ymenoptera (chiefly bred), made by 

 Mr. W. W. Froggatt, F.L.S., in New South Wales, with 

 Descriptions of new Genera and Species. Part ii. By P. 

 Cameron. (Communicated hy W. W. Froggatt) 636-655 



The Fibrb-vascular System of the Pear [Pome]. By D. McAlpine, 



Corresponding Member. (Plates xxvi.-xxix.) 656-663 



A Revision of the Australian Species of the Genus Cerceris 



[Hymenopteral By Rowland E. Turner, F.Z.S., F.E.S. ... 664-678 



Contributions to our Knowledge of Soil-Fertility. iv.The Agricere 

 and Bacteriotoxins of Soil. By R. Greig-Smith, D.Sc, 

 f Macleay Ijacteriologist to the Society .. ... .!. ... 679-699 



Note on a new Species of Favosites from Yass District, N.S.W. 

 [ACTINOZOA : Zoantharia]. By A, B. Walkom, B.Sc, Demon- 

 strator in Geology in the University of .Sydney. (Plates 

 xxx.-xxxi.) 700-701 



• 



Elections and Announcements ... ... ... ... ... 632 



Notes and Exhibits ... ... . ... .. ... . 632-635 



List of Donations and Exchanges ... ... ... ... .. 702-726 



Title-page ... ... ... ... ... .,. ... j 



Contents ... ... ... ... ... ... ... ... jji. 



List of Plates ... ... ... ... .. .. . vjj 



List of new Generia Names ... ... ... ... ... vii. 



Corrigenda... .. ... .. ... ... ... vj 



Index 



Note. —Special attention is called to the following necessary corrections : — 

 Page 294, line 15 — for Trymaltis, read Thymalitis. 

 Page 354, line 24— for Medinoschiza, read Nkdinoschiza. 

 Page 598, line 32— /or tibia, read labia. 



Page 600, line 30— /or- asthenogenetric, rm^asthenogenetic. 

 (See also Corrigenda, on p.vi., of Contents.) 



