McDichcstcr Mnst-iiin, Vol. xHv. (1900), No. S. II 



(])!. i., figs. I and 2) are the long linear i^innaj and the 

 erect falcate and coin])arativcl\' broad pinnules. 



Both s]:)ecimcns are undoubtedly portions of the same 

 species, which I believe to be identical with Pecoptcris 

 Willia}iiso)iis of Lindlcy and Hutton. Fertile specimens 

 of this species are fairly common, but it is rare to find 

 examples in which the nature of the sporangia can be 

 accurately determined. It has been clearly shown, how- 

 ever, by Schenk and Raciborski, that the sporangia agree, 

 both in their manner of occurrence and structure, with 

 those of the Osmundacea^. An excellent specimen of 

 this species in the Leckenby collection, Cambridge (Wood- 

 wardian Museum), enables me to confirm the conclusions 

 of these authors. The generic name, Toditcs, is adopted 

 as a more suitable designation than the recent genus 

 Todea, which some authors have used. In the form of the 

 frond, and in the shape of the pinnules, the fossil fern 

 agrees with Cibotiuni Barovictz Link, but the character 

 of the sporangia demonstrates that Toditcs IViilzajnsonz 

 must be included in the family Osmundacetne. It is to 

 Schenk^ and Raciborski- that we are indebted for accounts 

 of the s[)orangia ; the former author published a figure of 

 a fertile pinnule in his paper on the plants collected by 

 Szeckenyi in China, and Raciborski afterwards published 

 additional figures confirmatory of Schenk's account. 

 Raciborski's figures should be consulted as the best 

 evidence so far adduced in proof of the affinity of this 

 Jurassic fern. 



Sagcnopteris Phillipsi (Brongniart). 

 I'l. iii., figs. 7 and 8. 

 Fig. 7 = Type-specimen of Otopteris ciDieata L. & H., 

 pi. civ. (No. 57j. 



^ Schenk (S5). 



- Raciborski (91) and (94). 



