296 TKOCEEMNGS OF SOCIETIES. 



PLATE XIII. 



ALSO ILLUSTRATIVE OF DR. HARVEY'S PAPER. 



Fig. 



1a. Magnified view of a portion of the crust of Actinococcus Hennedyi 



2a. Fertile and barren filaments separated. 



3a. A tetraspore. 



1b. Part of the crust of Cruoria pellita, magnified. 



2b. Portion of a filament. 



3b. A tetraspore. 



1c. Cruoria (?). 



1 c. Some of the threads as they lie in the stratum. 



2c. Some separated, with a spore more highly magnified. 



Vide page 201. 



