ILLUSTRATIONS 



Pie. PAGE 



1. Larva of Chosrooampa poroellus 53 



2. Bougainvillea fruticosa ; natural size. (After All- 



man) ... 107 



3. Do. do. magnified . 108 



4. Do. do. Medusa-form . . . 109 



5. Medusa aurita, and progressive stages of development. 



(After Steenstrup) .... . . 110 



6. White Dead-nettle 124 



7. Do. 125 



8. Do. 125 



9. Salvia . 127 



10. Do. . . 127 



11. Do 127 



12. Primrose 131 



13. Do 131 



14. Arum . 135 



15. Twig of Beech . 140 



16. Arrangement of leaves in Acer platanoides . 142 



17. Diagram to illustrate the formation of Mountain 



Chains 216 



18. Section across the Jura from Brenets to Neuchatel. 



(After Jaccard) . .• . . . 219 



19. Section from the Spitzen across the Brunnialp, and 



the Maderanerthal. (After Heim) . . . 221 



xi 



