Transactions and proceedings and report of the Philosophical Society of Adelaide, South Australia . tralian Orchidology. Plate xiii. 322 Jones, Prof. F. Wood : The External Characters of Pouch Embryosof Marsupials. No. 1—Trickosurus vulpecula, var. xiv. and xv 360 Black, J. M. : Additions to the Flora of South Australia, No. 18. Plates xxii. and xxiii. ... ... ... ... ... ... ... 374 viii. CONTENTS (Continued). Miscellanea— Page. Notes on Occurrences during Summer Recess, 1919-20 379 Obituary Notice of Robert Etheridge 379 The Solvent Effects of Sea Water on Limestones 381 Note
Transactions and proceedings and report of the Philosophical Society of Adelaide, South Australia . tralian Orchidology. Plate xiii. 322 Jones, Prof. F. Wood : The External Characters of Pouch Embryosof Marsupials. No. 1—Trickosurus vulpecula, var. xiv. and xv 360 Black, J. M. : Additions to the Flora of South Australia, No. 18. Plates xxii. and xxiii. ... ... ... ... ... ... ... 374 viii. CONTENTS (Continued). Miscellanea— Page. Notes on Occurrences during Summer Recess, 1919-20 379 Obituary Notice of Robert Etheridge 379 The Solvent Effects of Sea Water on Limestones 381 Note on the Generic Position of Certain Australian Cambrian Trilobites 382 Sarsen Stones and Drift Pumice in New Zealand ... ... 383 Notes on X-ray Phenomena ... ... ... ... ... ... 383 Radio-active Photograph of Autunite 385 Radiograph of a Skull of an Australian Aborigine 385 Coorongite 386 Abstract of Proceedings 387 Annual Report ... • 394 Balance-sheets 396 Donations to the Library 398 List of Members 408 Appendix—Field Naturalists Section : Annual Report, etc. ... 411 General Index 417. THE Transactions OF The Royal Society of South Australia (Incorporated.) Vol. XLIV. The Igneous Rocks of encounter Bay,south australia. By W. R. Browne, (Communicated by Professor Walter Howchin.) [Read November 13, 1919.] Plates I. to IV. Contents. L Coastline Physiography. III. General Field Relations of the Igneous Rocks. (1) Granite Island. (2) Rosetta Head. (3) Port Elliot. IV. Petrography. (1) Porphyritic granite. (2) Quartz mica diorite. (3) Even-grained granite. (4) Albite mica syenite. (5) Red (potash) aplite. (6) Minor potash aplites, etc. (7) Soda aplite. (8) Greisenised soda granophyre. (9) Uralitic Petrogeny. (1) Genetic relationships of the rocks. (2) Mineralogical variations. (3) Discussion of the variation diagram. (4) Shape and nature of the intrusion. (5) Mechanics of differentiation. (6) Comparisons with similar rocks elsewhere in the
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