238 Mr. Brown on the Female Flower and Fruit of Rafflesia Arnoldi, 



Fig. 5. The same nucleus, whose membranous coat is separated by pressure, to show the 

 albumen : — magnified 100 diameters. 



Fig. 6. The denuded loosely-cellular albumen. 



Fig. 7* A portion of the albumen, exhibiting the embryo, its surface and lateral origin, ac- 

 cording to Mr. Bauer : — magnified 100 diameters. 



Fig. R. Br. is a longitudinal section of the albumen, exhibiting R. Brown's view of the 

 origin, form and surface of the embryo. 



Tab. XXVI. 



Fig. 1. A branch of the Vitis, on which are four very young buds of Rafflesia Arnoldi: — 

 natural size. Of these, 

 a, (not separately figured) is merely a very slight swelling, caused by the nascent para- 

 site, but before its parts are distinguishable. 



A. (also separately figured, vertically divided and moderately magnified), the youngest 



parasite whose parts are distinguishable, deeply seated, entirely enclosed, and 

 before its cortical covering corresponds with it in form. 



B. (in like manner separately figured, divided and magnified), in which the parasite is 



entirely enclosed in its reticular covering. 



C. In which the reticular covering has burst, vertically divided and magnified. 



Hydnora africana. 

 Tab. XXVII. 



Fig. 1. A flower of Hydnora africana, with its very short base. 

 Fig. 2. The same longitudinally divided : — both of the natural size. 



Tab. XXVIII. 



Fig. 1. Transverse section of a part of the tube of the perianthium, to show the three-lobed 



columna staminea : — moderately magnified. 

 Fig. 2. The inner surface of one of the three lobes of the column or antheral annulus. 

 Fig. 3. Outer surface of the same:— both magnified in the same degree with fig. 1. 

 Fig. 4. Vertical section of a portion of one of the lobes of the columna staminea, to show 



the thickness and texture of the common connective. 

 Fig. 5. Transverse section of the same, which shows the original bilocularity of each an- 



thera:— both more highly magnified. 

 Fig. 6. Grains of pollen, still more highly magnified. 



