MYCETOZOA 93 



diameter of a foot and more, and a thickness of two inches. 

 CJiondrioderma diffusum, often utilised as a convenient " laboratory 

 type," is common on the decaying haulms of beans in the late 

 autumn. The interest of this group is entirely biological, save 

 for the " flowers of tan." l 



1 The group was monographed by Schroter in Engler and Prantl's Pflanzen- 

 familien, I. Teil, Abt. 1, 1897. See also A. Lister's Monograph of the Mycetozoa, 

 1894 ; Massee, Monog. of the Myxogastres, 1893 ; Sir Edward and Agnes Fry. The 

 Mycetozoa, 1899 ; and Massee MacBride, The North American Slime Moulds, 1899. 



