OF CRETACEOUS PLANTS. 



271 



to add to the original description of this specimen. 

 The stem affected by the fungus is one of several 

 lying in the mineral matrix of the slide, but is the 

 only one of the genus Saururopsis hitherto discovered. 

 Throughout the cortex numerous blackened masses are 

 to be seen which are possibly the effete clusters of the 

 fungal tissues, but may be due to some secretion 



A. B. 



D. 



Text-fig. 22. — Fetrospheria japonica, Stopes & 3?»,jii. A & B. Ends of 

 liyphee cut off by transverse septum, and much swollen and thickened, 

 & D. Nests of thickened fungal " cells " in the periderm of the host 

 showing the form in which they commonly occur, X 750. After 

 Stopes & Fujii. 



natural to the host-stem. All round the stem just 

 below and within the periderm the hyphje and re- 

 productive masses have been petrified in the midst of 

 their activity. Hyphse with swollen ends similar to 

 those in the text-figure are seen in considerable 

 variety. Micro, section in slide 1 B2 in Stopes Coll. 

 Upper Cretaceous ; Hokkaido, Japan. 



Presented by Dr. M. G. Stopes, 1910. 



