EXPLANATION OF PLATE 



Peronosporites ramosus sp. two. 

 Fig. 



1 A transverse section of a punctate brachiopod shell inhabited 



by P. r a in o s u s. a=shell punctae. xloO 



2 Branch 6 of fig. 1. x625 



3 A shell cut parallel to the surface, showing an advanced stage 



of disintegration caused by P. ramosus 



Peronosporites globosus sp. nov. 



4 An impunctate brachiopod shell inhabited by P. globosus. 



x250 



Peronosporites minutus sp. nov. 



5 An impunctate brachiopod shell penetrated on one side only 



by P. minutus. xl25 

 I a. a spherical swelling on a hypha. xoOO; b. a hypha. x500 



