23 



PLATE XI. 



Cyclopteris (Nephropteris) obliqua. 



Bkong. 



These two pinnules differ from those commonly met 

 with under the name Cyclopteris in being still adherent 

 to the rachis of what would probably be a species of 

 Neuropteris, possibly Neuropteris auriculata. The frond 

 of which these pinnules formed part must have been of 

 very great size. 



The name Nephropteris has been conveniently attached 

 by Brongniart to a very varied assemblage of detached 

 pinnae or pinnules of this character, the true genus 

 Cyclopteris containing only a few foreign species estab- 

 lishing a passage between the Sphenopterids and the 

 Neuropterids. 



It would in the present instance be quite proper, no 

 doubt, to denote the specimen figured as Neuropteris sp., 

 but the Huttonian name (with the qualifying Nephropteris) 

 has again been preferred. 



The specimen figured is of the size represented, and 

 was found in the Bensham shale, at Jarrow Colliery. 



The drawing is by Prior. The Plate is reduced one- 

 third. 



