CONTENTS. V 



Page 



XVI. On the effects produced by some Insects, &c. upon Plants. 



By James Hardy, Penmanshiel 182 



XVII. Remarks on some British species of Carex. By W. O. 

 Priestley, F.B.S.E 188 



XVIII. Chronological Exposition of the Periods of Vegetation and 

 the different Floras which have successively occupied the surface of the 

 Earth. By M. Adolphe Brongniart 192 



XIX. On the position of the Impressions of Footsteps in the Bunter 

 Sandstone of Dumfries-shire. By Robert Harkness, Esq 203 



XX. Note to Mr. Harkness's paper on " The position of the Im- 

 pressions of Footsteps in the Bunter Sandstone of Dumfries-shire." By 



Sir W. Jardine, Bart 208 



New Books: — A Sketch of the Physical Structure of Australia, by J. 



Beete Jukes, M.A., F.G.S.— Outlines of British Geology ... 210, 211 



Proceedings of the Zoological Society 212 — 227 



On the Visual Organ of the Annelida, by M. A. de Quatrefages ; New / / 



Classification of Trilobites ; The Nepaul Bear, Ursus JSiflbella, vZf / 

 Horsfield; Description of a new species of the genus Thracia, by ' 



Dr. Jonas ; Remark on the genus Nocticula of J. V. Thompson, 

 by J. D. Dana; Meteorological Observations and Table ... 227 — 232 



NUMBER XXXIV. 



XXI. On the Hedge Plants of India, and the conditions which 

 adapt them for special purposes and particular localities. By Dr. Hugh 



F. C. Cleghorn, Hon. E.I.C.S 233 



XXII. Characters of new species of Helix from India, Mauritius and 

 the Cape of Good Hope ; also of a new Mauritian Tornatellina, with 

 remarks on the habits of a Cape Succinea. By W. H. Benson, Esq. . 251 



XXIII. Sketch of the Geology of the neighbourhood of Grantham, 

 Lincolnshire ; and a comparison of the Stonesfield Slate at Colly weston 

 in Northamptonshire with that in the Cotswold Hills. By the Rev. P. 



B. Brodie, M.A., F.G.S 256 



XXIV. Description of a new British Alga belonging to the genus 

 Sckizosiphon, Kiitz. By Robert Caspary, Ph.D. &c. (With a Plate.) 266 



XXV. On the Animal of Nautilus. By J. E. Gray, F.R.S 268 



XXVI. On some new genera and species of Silurian Radiata in the 

 Collection of the University of Cambridge. By Frederick M'Coy, 

 Professor of Geology and Mineralogy in Queen's College, Belfast 270 



