82 Mycetozoa of North America 



formed of closely interwoven sporangia, usually enclosed in a 

 smooth, white cortex, densely covered with lime, sometimes ecor- 

 ticate, seated on a white hypothallus. Sporangial walls within 

 the aethalium more or less perfect, membranous with deposits of 

 lime-granules. Capillitium of simple or branched, hyaline threads, 

 and large white lime-knots that may unite to form a pseudo- 

 columella, or almost Badhamia-Vike. Spores brownish violet, 

 spinulose, ellipsoid, 13-17 X 8-12 n, with spherical spores present. 



Type locality: Pennsylvania. 



Habitat: On dead leaves, composts, and decaying plant 

 remains. 



Distribution: *California, Colorado, Iowa, Kansas, Massa- 

 chusetts, Mississippi, New York, Ohio, Ontario, *Oregon, *Penn- 

 sylvania, Virginia, *West Indies. 



Illustration: Lister, Mycetozoa ed. 3. pi. 75. 



This species is not rare and is found usually on composts and 

 manure piles. It is often associated with a small phase of 

 Mucilago spongiosa, and the two forms are similar superficially, 

 but the character of the lime distinguishes them. The spores 

 distinguish it from 7^. septica and F. intermedia. The ellipsoid 

 spores predominate, although a few globose ones may be present. 

 Badhamia ovispora also develops on similar habitats, but may be 

 distinguished by the smooth spores, which appear shining by re- 

 flected light. F. cinerea occasionally forms ecorticate aethalia 

 among the normal ones, but it is hardly necessary to retain the 

 var. ecorticata Lister, which formerly included the form now re- 

 garded as F. intermedia, and the small ecorticate aethalia men- 

 tioned under F. septica. The spores of the latter are spherical, 

 smaller, and smoother than those of F. intermedia or F. cinerea, 

 although a trifle darker than those of F. septica. 



4. Fuligo muscorum Alb. & Schw. Consp. Fung. 86. 1805. 



Licea ochracea Peck, Rept. N. Y. State Mus. 28: 55. 1876. (N. Y. B. G. 



no. 11789, type material.) 

 Fuligo ochracea Peck, Rept. N. Y. State Mus. 31: 56. 1879. 



Plasmodium apricot-yellow (Lister). Aethalia pulvinate or 

 effused, 2 mm. to 5 cm. diam., scattered or clustered, nearly 

 smooth, formed of very closely interwoven sporangia, yellowish 

 or grayish, seated on a i)ale orange hypothallus; cortex absent or 

 indefinite; sporangial wall with scattered deposits of orange lime- 

 granules. Capillitium of numerous irregular, often branching. 



