ZAMITES. lis 



as shown in tie drawing, occur finer longitudinal lines, whicli 

 probably indicate strands of mectanical tissue between the true 

 veins. The specimen is incomplete ; at one end the lamina is 4 cm. 

 broad, and at the other 3-6 cm. 



Stonesfleld. Egerton Coll. 



V. 4064. PI. X. Fig. 5. 



Part of a leaf 13'5 cm. long, and 2-7 cm. broad at the widest end. 

 The parallel veins and the fainter intercostal lines are less clearly 

 shown than in the specimen represented in Fig. 4. One edge 

 (right) of the pinna is practically straight, while the other is 

 curved, a character frequently noticed in the segments of Cycadean 

 fronds. The circular soar near the broader end of the fossil is 

 simply a hole in the lamina. 



Stonesfield Slate. 



V. 4067. PI. XII. Fig. 5. 



A pinna 22 cm. long and 3'1 cm. broad at the widest end, but 

 tapering to a breadth of 4 mm. at the apical portion. Veins as in 

 the specimen represented in Fig. 4, PI. IX. This specimen, like 

 many others, shows that the lamina, which is almost or quite flat 

 at the broader end, becomes gradually more convex towards the 

 narrower end. This strongly arched form of the apical portion is 

 no doubt the result of contraction of the dead pinna. 



Stonesfield. 



V. 4652. PL XII. Fig. 3. 



Possibly a complete pinna, 8 '5 cm. long ; at the broader end the 

 lamina is somewhat contracted, and presents an appearance which 

 suggests that it is the actual base. 



V. 3460. PI. XII. Fig. 1. 



The broad truncate end of a pinna, showing the parallel veins 

 extending to the edge of the lamina. On the same piece of rock 

 occurs another fragment which represents an acuminate apex of 

 a lamina. 



Sevenhampton. S. Buchman Coll. 



PI. XII. Fig. 4. 



A specimen in the Oxford Museum, and probably the type of 

 Phillips' Palceozamia msgwphylla,. The pinna, which is 13 cm. long, 



