24 THE MYXOMYCETES 



Berk., Grev. 2 : 68, 1873; Tubulina lindheimeri (Berk.) Mass., Mon. 42, 

 1892). ^thalium usually thick and rather solid; much less flattened 

 in proportion to its size than the typical form; the cortex is porose 

 but firm, orange at first, becoming tawny with age, often exhibiting 

 two distinct layers; the interior grayish; the spores 6-7 /x. Bulliard 

 figures it well on pi. 380, fig. 1, and Sowerby's fig. 1 on pi. 399 is also 

 good, as is Greville's fig. 3 on pi. 272, showing the two colors men- 

 tioned. Not uncommon in the forest, from June to September. 

 Meylan believes it a valid species. 



Var. lams Pers. (as F. lavis). Similar to preceding, but usually 

 smaller, with a smooth, rusty brown, persistent cortex, which remains 

 when all the grayish sporiferous mass has been distributed. A forest 

 form, more apt to be found in the autumn, but appearing in July. 



Var. flava Pers. in sense of Morgan. Yellow or yellow-green; wide- 

 spread, but thin, the cortex yellow but extremely evanescent; the 

 capillitium yellow throughout. On fallen logs in moist dark woods. 

 Not common. The spores of most collections of the var. flava tend to 

 average somewhat larger than those of the other varieties, 8-8.5, 

 occasionally 9 fx. 



Var. violacea Pers. (as F. violacea). Plasmodium dark red or wine 

 colored; aethalium thin, 5-8 cm. broad; cortex at first dull red and very 

 soft, at length almost wholly vanishing so that the entire mass becomes 

 purple-violet, with the upper surface varied with white; capillitium 

 rather open, of more or less inflated, large irregular nodes joined by 

 long, slender, transparent filaments. Spores dark violet, minutely 

 roughened, spherical, about 7.5 fx. Ontario, Tennessee, Wisconsin, 

 Oregon. Probably widespread, but rarely noticed. Professor Morgan 

 regarded this as a well-defined species. In our material it seems more 

 distinct than the other varieties and may prove to be a good species. 



4. FULIGO INTERMEDIA Macbf. 



N. A. Slime-moulds ed. 2. 30. 1922. 

 PL I, Fig. 12. 



1911. Fuligo cinerea var. ecorticata Lister, Mycetozoa ed. 2. 88. 



^thalium 2-3 cm. in greatest diameter, or occasionally somewhat 

 larger, 0.5-1 cm. thick, covered with a thin, fragile, but not calcareous, 

 yellowish gray or brownish cortex; spore-mass gray or violaceous to 

 nearly black, firm, not sooty, the limy plates running through the 

 mass somewhat calcareous, intricate; capillitium inconspicuous; spores 

 globose, pale purple, faintly warted, 11-13 fx. 



The firm spore-mass and the moderately large spores serve to dis- 



