176 Mycetozoa of North America 



nected with the typical form by intermediate forms. In view 

 of their scarcity in North America, it seems better to regard them 

 as varieties until more abundant collections are found. In Pike 

 County, Pennsylvania, I have made repeated collections of the 

 form with long, slender, hyaline rods imbedded in the peridium. 

 It has also been obtained from Ontario. 



6. Lamproderma Gulielmae Meylan, Bull. Soc. Vaud. Sc. Nat. 

 52:449. 1919. 



Plasmodium translucent yellow (Brandza). Sporangia glo- 

 bose or obovoid, stalked, in loose clusters, 0.35 to 0.45 mm. diam., 

 silvery or iridescent blue, spotted with black depressed patches 

 corresponding to thickened purplish brown areas of the otherwise 

 colorless sporangial wall. Stalk black, subulate, 0.5 to 1 mm. 

 high. Capillitium consisting of pale brown or colorless threads 

 radiating from the columella, and branching repeatedly at acute 

 angles. Spores brownish purple, strongly spinulose, 12-15 /x 

 diam. (Plate 12, fig. 2.) 



Type locality: Switzerland. 



Habitat: On dead leaves and herbaceous stalks. 



Distribution: Colorado. 



Illustration: Lister, Mycetozoa ed. 3. pi. 215, figs. a-d. 



Two collections were made by Dr. W. C. Sturgis in the Wet 

 Mountain Valley of Colorado, in August 1914 (N. Y. B. G. nos. 

 11318, 11322), and are the only American collections known. 

 The small, silvery gray sporangia with black spots on the peridia 

 are well marked. The capillitium is pale, and the spores are 

 strongly spinulose. 



7. Lamproderma cribrarioides (Fries) R. E. Fries, Svensk Bot. 

 Tidskr. 4: 259. 1911. 



Stemonitis cribrarioides Fries, Syst. Myc. 3: 163. 1829. 



Plasmodium? Sporangia scattered or clustered, globose, 

 about 1 mm. diam., stalked or sessile, rarely forming plasmodio- 

 carps, purple-brown, shining with iridescent colors; sporangial 

 wall membranous, colorless above, purplish brown below. Stalk 

 black, 0.1 to 0.5 mm. high. Columella cylindrical, reaching to 

 half or two thirds the height of the sporangium, absent in the 

 plasmodiocarp forms. Capillitium a network of pale or dark 

 purplish brown, flexuose threads, stouter below, slender and 



