CONTENTS OF VOL 
VII 
. PAGE 
The Common Fkesh-avater Sponge (Spongilla fletiatilis). By 
Professor W. C. Williamson, F.E.S. Illustrated ... ... 1 
The HurPvICAne, the Typhoon, and the Tornado. By Professor 
D. T. Ansted, F.E.S 10 
Sensitiye Plants. By Maxwell T. Masters, M.D., F.L.S. Illustrated 22 
The Former Eange of the Eeindeer in Ehrope. By W. Boyd 
Dawkins, M.A., F.E.S., F.G.S 34 
The Science of a Snow-flake. By Eobert Hunt, F.E.S. Illus- 
trated ... ... ... 46 
The Food of Plants. By Professor Church, M.A., F.C.S. Eoyal 
Agricultural College ... ... ... ... 56 
The Gems and Precious Stones of Great Britain. By J. Morris, 
F.G.S., Professor of Geology in University College. Illustrated 123 
Is THE Fresh-water Sponge (Spongilla) an Animal ? By John 
Hogg, M.A., F.E.S., F.L.S., &c 134 
How TO Dissect a Flower. By M. C. Cooke. Illustrated ... 142 
The Polariscope, and how to work with it. By C. Hockin, 
M.A. Illustrated ... ... ... 152 
Free Nematoids. By H. Charlton Bastian, M.D., F.E.S., F.L.S. 
Illustrated ... ... 163 
On the Animals which are most nearly Intermediate between 
Birds and Eeptiles. By Professor Huxley, L.L.D., F.E.S. 
Illustrated 237 
The Study of Chemical Geology. By David Forbes, F.E.S. &c. 248 
Plants known by their Pollen-grains and other Cells. By 
George Gulliver, F.E.S 259 
The Great Eclipse of Aug. 17, 1868. By Eichard A. Proctor, 
B.A., F.E.A.S. Illustrated ... 263 
On the Eange of the Mammoth. By W. Boyd Dawkins, M.A., 
F.E.S 275 
Caddis-worms and their Metamorphoses. By Eev. W. Hough- 
ton, M.A., F.L.S. Illustrated ... 287 
The Lobster. By St. George Mivart, F.L.S., Lecturer on Compa- 
rative Anatomy in St. Mary’s Hospital. Illustrated ... ... 345 
