Vol. XXX., No. 8. 



August, 1921. 



CONTENTS. 



PAGE 



The Post-Glacial Climatic Optimum in Ireland — 



J. DE W. HiNCH . . . . . . . . 85 



Notes : 



The Wood- White Butterfly in Co. Dublin— A. W. Stelfox . . 97 



Behaviour of a Fritillary — R. Lloyd Praeger . . . . 97 



Acaena Sanguisorbae an Alien Colonist — C. B. Moffat, 



R. Lloyd Praeger . . . . . . . . . . 98 



Brachypodium pinnatum in Co. Dublin — J. S. Thomson . . 99 



Irish Societies : 



Belfast Naturalists' Field Club . . . . . . . . 99 



Dublin Naturalists' Field Club . . . . . . . . 100 



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