149 
in size, crawled outward from the center, when a dry and hot day caused simul- 
taneous fruiting, thus resulting in a regular ring of sporangia. The formation 
is thus quite similar to the circles formed by the ‘‘fairy-ring mushroom,” or 
Marasmius. 
MYXOMYCETES. 
Arcyria albida Pers. 
Arcyria flava Pers. 
Arcyria punicea Pers. 
Badhamia hyalina, Berk. 
Ceratiomyxa mucida Schroet, var. genuina List. 
Ceratiomyxa mucida Schroet, var. flexuosa List. 
Chondrioderma michelit Rost. 
Chondrioderma reticulatum Rost. 
Chondrioderma testatum Rost. 
Comatricha typhoides Rost. 
Craterium leucocephalum Ditm. 
Cribraria aurantiaca Schrad. 
Oribraria intricata Schrad. var. dictyoides List. 
Diachea elegans Fries. — 
Diachea splendens Peck. 
Dietydiwm umbilicatum Sebrad. (a form.) 
Didymium clavus Rost. 
Didymium effusum Link. 
Enteridium (olwaceum?) Ehreub. with free spores. 
Fuligo septica Gruelin. 
Hemitrichia clavata Rost. 
Hemitrichia rubiformis Lister. 
Hemitrichia serpula Rost. 
Lycogala miniatum Pers. 
Oligonema nitens Rost. 
Perichena populina Fries. 
Physarella mirabilis Peck. 
Physarum bivalve Pers. 
Physarum cinereum Pers. 
Physarum contextum, Pers. 
Physarum leucopus Link. 
Physarum nutans Pers. 
Physarum (rubiginosum ?) Fries. 
