XXl] OSMUNDACEAE 339 



phloem zone was produced. This most elaborate type proved 

 less successful than the simpler forms which still survive. 



Osmundites Sturii. 



Impressions of fertile pinnae with narrow linear segments 

 bearing exannulate sporangia described by Raciborski from 

 Lower Jurassic rocks in Poland as Osmunda Sturii^ may with 

 some hesitation be included in the list of Mesozoic Osmundaceae. 



Osmundites Dowheri. 



Under this name Carruthers^ described a petrified stem from 

 Lower Eocene beds at Heme Bay, which in the structure of the 

 stele agrees closely with the Jurassic species 0. Gibbiana and 

 conforms to the normal Osmundaceous type. It is possible, 

 as Gardner and Ettingshausen* suggested, that the foliage of 

 this species may be represented by some sterile Osmunda-\i^e 

 fragments recorded from the Middle Bagshot beds of Bovey 

 Tracey and Bournemouth as Osmunda lignitum. 



Todites. 



This generic name* has been applied to fossil ferns exhibiting 

 in the structure of the sporangia and in the general habit of the 

 fertile fronds a close resemblance to the recent species Todea 

 harbara (fig. 221, D, p. 286). 



Todites Williamsoni (Brongniart) figs. 256, B, C, G. 



1828. Pecopteris Williamsonis, Brongniart, Prodrome, p. 57 ; Hist. veg. 



foss., p. 324, PI. ex. figs. 1 and 2. 



P. whithiensis, Brongniart, Hist. v^g. foss. p. 321, PI. cix. figs. 



2—4. 



— P. tenuis, ibid. p. 322, PI. ex. figs. 3, 4. 



1829. Pecopteris recentior, Phillips, Geol. Yorks. p. 148, PI. viii. fig. 15. 



— P. curtata, ibid. PI. viii. fig. 12. 



1833. Neuropteris recentior, Lindley and Hutton, Foss. Flora, Vol. i. 



PI. LXVIII. 



— Pecopteris dentata, ibid. Vol. ill., PI. clxix. 



1836. Acrostichites Williamsonis, Goeppert, foss. Farn. p. 285. 



1 Raciborski (94) A. p. 19, Pis. vi. xi. 



2 Carruthers (70) A. ; Kidston and Gwynne-Vaughan (07) p. 768 ; see also 

 Seward, Vol. i. p. 212. 



3 Gardner and Ettingshausen (82) pp. 22, 48, PI. iv. figs. 1—3. 

 * Seward (00) p. 86. 



