MATONIDITJM. 



67 



V. 2222. Woodcut, Fig. 8. Portions of several pinnse con- 

 verging to a large rachis. Far inferior in preservation to Schenk's 

 figured specimens. Ecclesbourne. Ru/ord Coll. 



V. 2223. On this specimen is a fragment of a fertile pinna 

 showing the position of the sori. Ecclesbourne. Ru/ord Coll. 



Fig. S.Matonidium Gopperti (Ett.) (V. 2222). 



V. 2737. The pinnules are larger than in the other specimens, 

 more like those of Microdictyon in size, but their shape is that of 

 Matonidium. 



Similar examples of size variation have been referred to in the 

 figures of Schenk, Heer, and Trautschold. Ecclesbourne. 



Ru/ord Coll. 



V. 2175, V. 21750, V. 2178, V. 2205, V. 2384. Pinnules 

 narrower than usual. Ecclesbourne. Ru/ord Coll. 



10,827, 11,618. Tilgate Forest. 



Mantdl Coll. 



