49 



PLATE XXIV. 



Pecopteris (Alethopteris) lonchitidis. 



Steenb. 



(Pecopteris heterophylla.) 



Likdl. and Hutt. 



A remarkably fine specimen of this elegant fern. Here 

 the ordinary characters of the species (which is a very 

 common one) are found at the extremity of the pinna 

 only. The rest presents many points of similarity with 

 Pecopteris dentata although the lobes of the pinnules are 

 quite entire. The species should be compared also with 

 Pecopteris Glockeri (Goepp.) and with Pecopteris Serin, 

 through which it is allied to the group referred to in con- 

 nexion with Plates XXII. and XXIII. 



The autotype is about two-thirds of the original draw- 

 ing (by Prior) which is of the natural size. 



This beautiful fossil came from the shale roof of the 

 Bensham seam, Jarrow Colliery. 



