98 EXPLANATION OF PLATES 58. 59. 60. 61. 



Plate 58. V. I. p. 493. 



Cycas revoluta, producing Buds from the axillse of the 

 scales, or persistent bases of leaves, that form the false 

 bark. Drawn from a plant in the conservatory of Lord 

 Grenville at Dropmore, 1832. 



Plate 59. V. I. p. 494. 



Fig. 1. Zamia pungens, with its fruit, as it grew at 



Walton on Thames, 1832, in the Conservatory of 



Lady Tankerville. (Lambert.) 

 Fig. 2. Transverse section of the trunk of Zamia horrida, 



from the Cape of Good Hope. (Buckland.) 

 Fig. 3. Transverse section of a young trunk of Cycas 



revoluta. See Geol. Trans. Lond. 1828. N. S. Vol. ii. 



Pt. 3. PI. 46. (Buckland.) 



Plate 60. V. L p. 497. 



Fig. 1. Silicified trunk of Cycadites megalophyllus, 

 from the Dirt bed in the Isle of Portland. (Ori- 

 ginal.) 

 Fig. 2. Portion of the Base of Fig. 1. See V. L p. 497, 



Note. (Original.) 

 In Plates 60, 61, A represents the central mass of cellular 

 tissue. B the single circle of radiating woody plates. 

 C the circle of cellular tissue, surrounding B. And D 

 the case or false Bark, surrounding C. And in PI. 61, 

 Fig. 1, b, represents a second circle of radiating woody 

 plates. 



Plate 61. V. I. p. 497. Note. 



Fig. 1. Sihcified trunk of Cycadites microphyllus, from 

 the Isle of Portland, with numerous buds rising 

 from the axillee of the Petioles. (Original.) 



