174 



PACHYPTBKIS. 



as Scleropteris Pomelii 1 from the Corallian of Verdun (Meuse) and 

 the English species, but it is not clear that the two are identical. 

 By far the best examples of Pachypteris are those described by 



PIG. 28. Pachypteris lanceolata, Brongn. From a specimen in 

 the Scarborough Museum. (Nat. size.) 



JZigno as species of DicJiopteris from the Italian Oolite ; in size 

 and preservation they are greatly superior to the Yorkshire 



Saporta (73), p. 370, pis. slvi. and xlvii. 



