Enteridium 217 



Illustration: Lister, Mycetozoa ed. 3. pi. 153, figs. a~c. 



I have found this species a dozen times or more in New Hamp- 

 shire, New York, and Pennsylvania. Often, the developments 

 consist of many aethalia, and in one such collection from Long 

 Island, there were several small clusters of sporangia and a single 

 sporangium. These have thin, iridescent walls which are com- 

 plete, the capillitium is wanting, and the spores are clustered and 

 the same as those of the adjoining aethalia. They illustrate in a 

 marked degree the relationship of the sporangium to the aetha- 

 lium, and that one has developed from the other. Separated, 

 such sporangia are like forms in the genus Licea, but do not con- 

 form to any known species. 



Enteridium liceoides G. Lister (Guide Brit. Mycet. ed. 4. 48. 

 1919) was formerly regarded as a variety of the present species. 

 In the third edition of the Monograph (page 194) Miss Lister 

 mentions an intermediate form gathered by Prof. Farlow at 

 Chocorua, New Hampshire. Subsequently in correspondence 

 she writes the spores are too pale-pink and too smooth for E. 

 liceoides, and that it is almost surely Dianema corticatiim. The 

 two species are very close and difficult to separate in obscure 

 specimens. E. liceoides has not been reported otherwise from 

 North America. The spores in the species are brown or oli- 

 vaceous. 



2. Enteridium minutumSturg. Mycologia 9: 329. 1917. (N. Y. 

 B. G. no. 11314, type.) 



Plasmodium? Aethalia rounded or elongate, pulvinate, pale 

 umber in color, seated on a broad membranous base, 1.5 to 2 mm. 

 diam.; wall wrinkled and usually marked with small, scattered 

 pits, pale yellow, membranous. Walls of the component sporan- 

 gia membranous, minutely roughened, perforated with round 

 openings, the margins of which show many free threads; or re- 

 duced to irregular, anastomosing strands arising from the base of 

 the aethalium, with membranous or net-like expansions at the 

 angles and with many delicate, free, pointed ends. Spores pale 

 yellow, usually united in twos or threes and ovoid or flattened on 

 one side; when free, globose, very minutely spinulose, 9.5-10.5 n 

 diam. (Plate 5.) 



Type locality: Eldora Lake, Colorado. 



Habitat: On dead coniferous wood. 



