28 Mycetozoa of North America 



0.5 mm. diam.; sporangial wall thick, densely charged with lime- 

 granules. Capillitium white or nearly so, rugged, with large 

 nodes of irregular shape filled with lime, often confluent in the 

 center to form a pseudo-columella. Spores dark purplish brown, 

 with prominent warts more or less confluent to form ridges, 10- 

 \5 fi diam. 



Type locality : Europe. 



Habitat: On dead leaves etc., in wet areas; conmion. 



Distribution: Throughout eastern continental North 

 America. 



Illustration: Lister, Mycetozoa ed. 3. pi. 13. 



This species requires much moisture, and under such circum- 

 stances develops abundantly. The sporangia are very uniform 

 in appearance and characters. 



17. Badhamia rubiginosa (Chev.) Rost. Mon. App. 5. 1876. 



Physarum rubiginosnm Chev. FI. Par. 1: 338. 1826. Not P. ruhiginosum 



Fries. 1817. 

 Didymium Curtisii Berk. Grevillea 2: 65. 1873. (N. Y. B. G. no. 10716, type 



material.) 

 Craterium obovatum Peck, Rept. N. Y. State Mus. 26: 75. 1874. (N. Y. B. G. 



nos. 7950 and 10705, type material.) 

 Badhamia subaquila Macbr. N. A. Slime-Moulds 64. 1899. 



Plasmodiuni bright yellow (Lister). Sporangia scattered and 

 in loose clusters, obovoid, stalked, rarely sessile, about 0.5 mm. 

 diam., pale rufous or purplish brown, usually paler above, the 

 upper part breaking away in fragments from the more persistent 

 lower part, sometimes with a distinct lid; sporangial wall mem- 

 branous, purplish, more or less charged with lime-granules. Stalk 

 cylindrical or widened at the base, usually about the length of the 

 sporangium, smooth, reddish brown, continued into the sporan- 

 gium to more than half of its height as a pale, clavate or cylindrical 

 columella, often containing calcareous nodules. Capillitium a 

 white or pale rufous rugged network, usually densely charged 

 with lime-granules, spreading from all parts of the columella to 

 the sporangial wall, sometimes with a few, hyaline, connecting 

 threads. Spores dark purplish brown, spinulose, 11-15 /x diam. 

 (Plate 15, fig. 1.) 



Type locality: France. 



Habitat: On dead leaves, twigs, and living plants in wet areas, 

 and on dead wood in the forests. 



