The Publisher will mail this Journal to any Address in the United State', for one year, on receipt of 
Post Office Order for 11s. 
No. 18. Series. April 1881 . [2s. 6d. 
THE POPULAR 
EDITED BY W. S. DALLAS, F.L.S. 
Assistant-Secretary of the Geological Society . 
CONTENTS. 
The Myxomycetes or Mycetozoa ; Animals or Plants P 
By W. Saville Kent, F.L.S., F.Z.S., F.R.M.S. (Illustrated.) 
The Permanence of Continents. By j. Starkie Gardiner, f.g.s. 
Preliminary Note on the Existence of Ice and other Bodies 
in the Solid State at Temperatures far above their ordinary Melting 
Points. By Thomas Carnelly, D.Sc., Professor of Chemistry in Firth College, 
Sheffield. (Illustrated.) 
On the Former Existence of the Roe-Deer in England. 
By J. E. Harting, F.L.S. , F.Z.S. 
Contributions to the Knowledge of the Hottentot Race. 
By M. J. A. Roonda Smit. 
REVIEWS. 
Animal Life — A Polar Reconnaissance — Helmholtz's Lectures — Nature’s Hygiene 
— Physiological Chemistry — The Constitution of the Earth — Steam and the 
Steam-Engine — Extinct British Animals — The Christian Knowledge Society — 
Plant Life — Movements of Plants. 
SCIENTIFIC SUMMARY. 
Anthropology — Astronomy — Botany — Geology and Palaeontology — Physics — 
Zoology. 
ILLUSTRATED. 
LONDON : 
DAVID BOGTTE, 
3 ST. MARTIN’S PLACE, TRAFALGAR SQUARE. 
LONDON : FEINTED* BY STRANGEWAYS AND SONS, TOWEE STREET, UPPER ST. MARTIN’S LANE. 
le First Series, edited by Dr. H. Lawson, may be had complete in numbers, price 
£7 12s. 6d. ; or, 15 Volumes, in cloth, £9 2s. in half-morocco, £11 8s. 
