CONTENTS. 







Page 



Art. X. — Some Mechanical Cuiiosities connected with the 



Earth's Field of Force ; by W. D. Lambert 129 



Art. XL— Fauna of the Dallas Sand Pits ; by R. S. Lull, . .159 



Art. JLll. — Dlrca pahistris Jj., A morphological study ; by 



T. Holm. .177 



Art. XIII, — A Pseudocycas from British Columbia ; by E. 



W. Berry. 183 



