88 TODITES. 



1868. Acrostichites Williamsonii, Eichwald, Leth. Ross. p. 17, pi. ii. fig. 3. 



1869. Pecopteris (Acrostichites) Williamsoni, Schimper, Trait, pal. veg. 



vol. i. p. 528. 

 Alethopteris recentior, ibid. p. 566. 



1874. Cladophlebis dentata, ibid. vol. iii. p. 505. 

 C. recentior, ibid. 



1875. Pecopteris dentata, Phillips, Geol. Yorks. p. 208, lign. 21. 

 P. curtata, ibid. p. 209, pi. viii. fig. 12. 



P. Williamsonis, ibid. p. 209, lign. 23, pi. x. fig. 7. 

 P. recentior, ibid. p. 211, pi. viii. fig. 7. 

 1877. ? Asplenitim ivhitbiense, Heer, Flor. foss. Arct. vol. iv. (ii.) p. 39, 



pi. iii. figs. 1, 2 ; pi. xx. fig. 4. 

 ? A. tvhitbiense tenue, ibid. p. 39, pi. iii. fig. 3 ; p. 94, pi. xvi. fig. 8 ; 



pi. xx. figs. 1 and 3. 

 1885. Todea Williamsonis, Schenk, Palacont. vol. xxxi. p. 168, pi. iii. fig. 3- 



1889. Cladophlebis virginiensis, Fontaine, Potomac Flora, p. 70, pi. iii. 



figs. 3-8 ; pi. iv. figs. 1 and 4. 

 C. parva, ibid. p. 73, pi. vi. figs. 1-3. 

 C. distans, ibid. p. 77, pi. xiii. fig. 4. 

 Asplenium ^vhitbiense, Yokoyama, Journ. Coll. Sci. Japan, vol. iii. 



p. 32, pi. iii. fig. 3. 



1890. Pecopteris curtata, Schimper & Schenk, Handbuch, p. 100. 

 P. recentior, ibid. 



1891. Todea Williamsonis, Eaciborski : Engler, Bot. Jahrb. xiii. p. 2, pi. i. 



figs. 7-10. 



1892. Acrostichites tennis, Fox-Strangways, Tab. Foss. p. 128. 

 A. Williamsonis, ibid. 



Pecopteris dentata, ibid. p. 132. 

 1894. Todea Williamsonis, Eaciborski, Flor. Krak. p. 158, pi. vi. figs. 17-20. 



Cladophlebis ivhitbiensis, ibid. p. 215, pi. xxi. figs. 1, 2, 8-10. 



C. solida, ibid. p. 79, pi. xxiv. figs. 10-13. 



1896. Todea Williamsonis, Hartz, Med. om Gronland, vol. xix. p. 232, 

 pi. xii. figs. 4 and 4. 



Type - specimen. Natural History Museum, Paris. [Type- 

 specimen of Pecopteris dentata 1 in the Manchester Museum, Owens 

 College.] 



Frond bipinnate. The rachis straight and stout, especially in 

 the fertile fronds, often more than 1 cm. in breadth. 



Pinnae long, 20-30 cm., of uniform breadth, linear and gradually 

 tapering to an acuminate apex, alternate and crowded on the 

 rachis, given off at an acute angle (cf. PL XV. Fig. 2), but in 

 the lower part of a frond the habit is more open and spreading 

 and the pinnae are almost at right angles to the rachis. 



Seward (00), pi. i. 



