SIR J. LTTBBOCK — PHTTOBIOLOOTCAL OBSERVATTOyS. 



353 



Fig. IG. 



Fig. 17 



b^^ ^ 



Seedling o^ Bucllia Jlava 

 Half nat. size. 



Fig. 18. 



Seedling of Fihus ti/phina. 

 Half naE 'size. 



Fig. 19 



S 



eedling of M^nispcrmiiin canadensc. 



Half nat, size. 



Seedling of F)ax {Livnm mono- 

 gi/ntim), ISaU size. 



