FACSIMILES OF SKETCHES IN THE 



LETTERS. 



PAGE 



Figure i. Hypothetical Section illustrating Conti- 

 nental Elevation 123 



,, 2. Diagram of Junction between Dike and Lava 129 



„ 3. Outline of an Elliptic Crater . . .129 



Crucifer 289 



13. * LEAF OF Trifolium resupinatum .... 412 

 (Drawn by Miss Pertz.) 



* Not a facsimile. 



