DIDYMIUM 117 



poetic, metaphoric tongue, the Polish author gives them abundant con- 

 sideration. In the Mon., Tab. IX., Figs. 166 and 180, he clearly 

 shows the structure, although in the explanation of the plate he has 

 strangely mixed this species with D. crustaceum Fr. Under D. 

 serpula Fries may refer to the present species, although there is noth- 

 ing in his description to determine the fact. The same thing may be 

 said of the description and figures of Batsch. Rostafinski, in the 

 Monograph, seems to have been satisfied as to the identity of Batsch's 

 materials : in the Appendix, he writes D. serpula, but gives no reason. 

 Rare. New York. England, France, Germany. 



2. DlDYMlUM ANELLUS Morgan. 



Plate XVIIL, Fig. 7. 



1894. Didymium anellus Morgan, Jour. Cin. Soc, p. 64. 

 1899. Didymium anellus Morg., Macbr,, N. A. S., p. 85. 

 1911. Didymium anellus Morg., Lister, Mycetozoa, 2nd ed., p. 134. 



Plasmodiocarp in small rings or links, then confluent and elongated, 

 irregularly connected together, bent and flexuous, resting on a thin 

 venulose hypothallus, or sometimes globose, the peridium dark col- 

 ored, with a thin layer of stellate crystals, irregularly ruptured; 

 capillitium of slender, dark-colored threads, which extend from base 

 to wall, more or less branched, and combined into a loose net ; colu- 

 mella a thin layer of brown scales; spores globose, very minutely 

 warted, violaceous, 8-9 ji.. 



This minute species resembles a poorly developed, or sessile, phase 

 of D. melanospermum. Some of the sporangia (?) are spherical; 

 such show a very short dark stalk. The columella is scant, and the 

 spores are smaller than those of D. melanospermum. 



Ohio. Reported more recently from Europe and Ceylon. 



3. Didymium wilczekii Meylan. 



1908. Didymium ivilczekit Meyl., Bull. Soc. Vaud. Sci. Nat., XLIV., p. 290. 

 1911. Didymium ivilczekii Meyl., List, Mycetozoa, 2nd ed., p. 134. 



Plasmodiocarpous, dehiscing irregularly, columella scant ; capil- 

 litium abundant, the threads brown, anastomosing, forming an elastic 

 net; spores purple-brown, minutely spinulose, 10-12 jx. 



