CONTENTS OF VOLUME XXL, Pt. I. 



Art. I. — On the Longevity of Seeds. By Alfred J. Ewart, 

 D.Sc, Ph.D., F.L.S.; with an Appendix by 

 Jean White, M.Sc. (Plates I., II.) ... ... 1 



II.— The Silurian Eocks of the Whittlesea District. By J. T. 

 JuTSON ; with an Appendix on the Fossils Collected, 

 by F. Chapman, A.L.S., Etc. (Plates III., IV., V.) 211 



III. — The Body Spaces and so-called Excretory Organs of Ibla 



quadrivalvis. By Freda Bage, M.Sc. (Plate VI.) 226 



IV. — Further Descriptions of the Tertiary Polyzoa of Victoria, 



PartX. ByO. M. Maplestone. (Plates VII., VIII.) 233 



v.— The Cherts and Diabase Rocks of Tatong. By H. S. 



Summers, M.Sc. (Plate IX.) ... ... ... 240 



VI. — Note on an Abnormal Development on Leaves of Prunus 



cerasus. By Bertha Eees. (Plate X.) ... ... 247 



VII. — Note.s on the Dolodrook Serpentine Area and the Mt. 

 Wellinjrton Rhyolites, North Gippsland. By E. O. 

 Thiele, B.Sc. (Plate XI.) ... ... ... 249 



Appendix to Art. VII. — Preliminary Notes on a Collection 

 of Trilobite Remains from the Dolodrook River, N. 

 Gippsland. By F. Chapman, A.L.S., Etc. ... 268 



VIIL— The Graptolite Beds at Daylesford. By T. S. Hart, 



M.A., F.G.S. (Plate XII.) ... ... ... 270 



IX. — Geology of the Proposed Nillahcootie Water Conser- 

 vation Area. ByH. S.Summers, M.Sc. (Plate XIIL) 285 



X. — On the Evidence of the Origin, Age, and Alteration of 

 the Rocks near Heathcote, Victoria. By Ernest W. 

 Skeats, D.Sc, A.R.G.S., F.G.S. (PI. XIV.-XVIII.) 302 



XI. — Variations in the Anatomy of Hyla aurea. By Georgina 



Sweet, D.Sc. (Plates XIX., XX.) ... ... 349 



XII. — On Some New Species of Victorian Marine Mollusca. 



By J. H. Gatliff and C. J. Gabriel. (Plate XXI.) 365 



XIII. — Additions to and Revision of the Catalogue of Victorian 

 Marine Mollusca. By J. H. Gatliff and C. J. 

 Gabriel ... ... ... ... ... 368 



XIV. — On the Occurrence of the Genus Linthia in Victoria, with 

 description of a new species. By G. B. Pritchard, 

 B.Sc, F.G.S. (Plates XXII., XXIIL) ... ... 392 



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