174 



PACHTPTBHIS. 



as Scleropteru PomelW^ from the Corallian of Verdun (Meuse) and 

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

 By far the hest examples of Pachypteris are those described by 



Fig. 28. — FacJujpfcris laiiccolato, Brongn. From a specimen in 

 the Scarborough Museum. (Nat. size.) 



2igno as species of Bicliopteris from the Italian Oolite ; in size 

 and preservation they are greatly superior to the Yorkshire 



' Saporta (73), p. 370, pis. xlvi. and xlvii. 



