TODITES. 93- 



species of Acrostichites figured by Fontaine in the Older Mesozoio 

 Flora of Virginia * and Todites Williamson! , 



39,234. PL XV. Fig. 2. 



A. large specimen 45 cm. in length, bearing crowded linear 

 pinnae springing from the broad rachis at a wide angle. The 

 longest pinna measures 15 '5 cm. in length; the pinnules are 

 broad and short, and closely set on the long pinna axis. This 

 example shows very clearly the characteristic habit of the frond, 

 the long and very gradually tapered pinnae, and the crowded, 

 short, and broad pinnules, with their inner margins strongly 

 convex and the outer edge straight or slightly concave and 

 bulging outwards towards the broad base. The venation is clearly 

 shown. Cf . this specimen and the examples with larger pinnules, 

 e.g. 14,202. 



Gristhorpe. Bean ColL 



13,491. PI. XV. Figs. 1 and 3. 



This specimen, a portion of which is represented in the figure, 

 affords a good example of the common fertile frond of Todites 

 Williamsoni. The rachis is 8 mm. broad, and boars pinna? 1-3 cm. 

 in breadth; the under surface of the pinnules shows the midrib 

 and secondary veins distinctly, and scattered circular pits marking 

 the position of sporangia. (PL XV. Fig. 3.) Cf. the longer 

 fertile frond of the same type, 39,271. 



Haiburn "Wyke. Presented by Dr. Murray. 



39,274. PL XXI. Fig. 6. 



An instructive specimen of a large sterile frond, 19cm. in length, 

 of the form figured by Lindley & Hutton as Pecopteris dentata. 

 The rachis gives off numerous crowded pinnae, the longest of which 

 is 14 cm. long and T3 cm. in breadth ; as shown in the figure, the- 

 ultimate segments become more falcate and sharply pointed towards 

 the tips of the pinnae. The margins of the pinnules appear to be 

 entire, but in some of them the margin is slightly irregular ; each 

 pinnule is traversed by a midrib, from which are given off forked 

 secondary veins at an acute angle. 



1 Fontaine (83). 



