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 209 



1 3.* LEAF OF Trifolium resupinatum . . . .412 

 (Drawn by Miss PERTZ.) 



* Not a facsimile. 



vni 



