LACCOPIEEIS. 



85 



1873. Microdictyon Woodioardianum, Saporta, Pal. Fran9. vol. i. p. 313, 

 pi. xxxiii. 

 ? M. rutenicum, ibid. p. 309, pi. xxxiii. figs. 2-4 ; pi. xliv. 

 1875. Fhlehopteris Woodwardii, Phillips, Geol. Yorks. p. 202. 

 1892. FhUbopteris Woodwardi, Fox-Strangways, Tab. Poss. p. 134. 



Cf. Miorodiotyon Woodiiim-diamum, Bartholin, p. 24, pi. i. figs. 2-4. 



Type-specimen. "Woodwardian Museum, Cambridge (Leckenby 

 €oUection, ISo. 126). 



Habit in. all probability identical witb that of tbe preceding 

 species. The venation of the ultimate segments similar to that of 

 Laoeopteris polypodioides, but the veins that spring from the large 

 areolae next the midrib are more numerous and closer together ; 

 the sori are circular and, except in their smaller size, apparently 

 identical with those of Brongniart's species. 



Leckenby founded this species on some fragments of pinnules 

 identical with the specimen represented in Text-fig. 11a. It 



Fig. 11. 



A. — Pinnule of Zaccopteris Woodwardi from tbe Inferior Oolite of Yorkshire, 

 showing reticulate veins and hemispherical bosses with a small central 

 depression, marking the position of circular sori which were attached to 

 a central receptacle. (No. 217, British Museum.) 



B. — Pinnule of Laoeopteris polypodioides, with sori and soral impressions. Upper 

 Shale, Gristhorpe Bay. (No. 2522, British Museum.) 



■C. — Pinnule fragment from the Inferior Oolite of Stamford. 

 British Museum.) 



(Block lent by the Royal Society.) 



(No. 52,867, 



is probable that Leckenby' s type is specifically distinct from 

 Laccopteris polypodioides, but the difference between the two ferns 

 appears to be slight ; the former is characterized by its smaller 



