360 



FILICALES 



[CH. 



The specimen shown in fig. 268 is probably a young frond of 

 this species. 



A very similar, possibly a specifically identical plant, was 

 described by Leckenby from English Jurassic rocks as Phleho- 

 pteris Woodwardi'^, the distinguishing features of which are the 

 greater number of lateral veins and the smaller sori (fig. 267, A). 



The name Microdictyon was proposed by Saporta^ for pinnules 



Fig. 268. 7 Laccopteris poh/podioides. Nat. size. From a specimen in the 

 Whitby Museum (Brit. Mus.). 



differing slightly from those of Laccopteris in venation characters: 

 he included Laccopteris Woodwardi in this genus, but such 

 differences as are recognisable in the venation hardly justify the 

 use of a distinct generic title. Similarly, specimens described by 

 Debey and Ettingshausen^ from Lower Cretaceous rocks of Aix- 

 la-Chapelle as species of Carolopteris may also be included in 

 Laccopteris. 



1 Leckenby (64) A. p. 81, PI. viii. fig. 6. (Type-specimen in the Sedgwick 

 Museum, Cambridge.) 



'•^ Saporta (73) A. p. 306. ^ Debey and Ettingshausen (59) PI. iii. 



