66 



MATONIDITJM. 



their identity with Matonidium. The position of the pinnae shows 

 a gradual convergence towards a point of attachment. 



The elliptical or oval sori are distinctly shown on the lower 

 surface of the pinnules. Ecclesbourne. Rufford Coll. 



Fig. 7. Matonidium Gopperti (Ett.), showing portion of a fertile 

 pinna (a) (V. 2218). 



V. 721. Rachis very prominent ; some of the pinnules with 

 sori. Ecclesbourne. Damon Coll. 



V. 2208. Very similar to V. 2218. Pieces of six pinna9. Note 

 the gradual convergence towards the original point of attachment to 

 the stout rachis. Ecclesbourne. Rufford Coll. 



V. 2211. Shows the convergence to a common point of attach- 

 ment of imperfectly preserved pinnaa. Ecclesbourne. Rufford Coll. 



V. 2215. Small fragments of ? fertile pinna3. Ecclesbourne. 



Rufford Coll. 



