1 08 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 3 



separated by a cross wall. The contents of the swollen apex and tube be- 

 come segmented — apparently by successive division — into an extremely 

 large number of roundish or somewhat angular spores about 10/a in di- 

 ameter. The cytoplasm of these bodies consists of a granulated matrix, 

 within which are embedded a few bright granules. No spore discharge was 

 ever witnessed. The frequent finding of columns of motionless spores in 

 the medium seemed to indicate that they were set free upon the disintegra- 

 tion of the wall of the discharge tube. 



In its superficial aspect the fungus resembles a species of Blastocladi- 

 ella. An even closer resemblance to the recently described Rhizidiomyces 

 bivellatus (Nabel, 1939) is found not only in the presence of a discharge 

 tube but in the occasional lack of a stalk. Nabel's fungus was discovered 

 in soils collected in Haiti, Venezuela, Mexico, and Yugoslavia. 



