39 



mycetozoa in the sporangia! Stage. Most of the common species 

 of this region can be placed in one of three groups, as follows: 



Group I. 1 Forms with sporangia which occur mostly on rela- 

 tively firm to hard and sound wood or dry leaves (including 

 needles of gymnosperms) or both, indicating that they require 

 relatively dry situations. 



Group II. 1 Forms with sporaniga which occur mostly on 

 relatively soft to disintegrating wood or wet decaying leaves 

 (including needles of gymnosperms) or both, indicating a prefer- 

 ence for, or a tolerance of, situations somewhat wetter than 

 those of group I. 



Group III. Forms with sporangia which seem to be equally 

 tolerant of either situation and occur about equally distributed 

 on both types of substratum. 



These groups seem to be, for the most part, fairly definite 

 and constant. Occasionally, how r ever, an exception is noted and 

 a form which commonly appears in situations characteristic of 

 group I is found in one characteristic of group II and vice versa. 



Columbia University, New York, N. Y. 



Literature Cited 

 Bary, H. A. de 1860. Die Mycetozoen. Zeit. f. wissensch. Zoologie 10: 88-175. 

 Hadden, N. G. 1921. Mycetozoa at Porlock in October 1920. British Mycol. 



Soc. Trans. 7: 13-16. 

 Hagelstein, R. 1929. New mycetozoa from Long Island. Mycologia 21: 297- 



299. 

 . 1930. Mycetozoa from Jones Beach State Park. Mycologia 22: 256- 



262. 

 Lister, Arthur 1925. A monograph of the mycetozoa. (Third edition, revised 



by G. Lister.) Oxford University Press. 

 Lister, Gulielma 1922. List of mycetozoa found during the Worcester foray. 



British Mycol. Soc. Trans. 8: 8-9. 

 . 1926. Mycetozoa found during the Bettws-y-coed foray. British 



Mycol. Soc. Trans. 10: 240-242. 



1 Only wood and foliar structures are listed, as they are by far the most 

 common substrata. Stones, moderately dry nut shells, moss plants, bracket 

 fungi, herbaceous stems, etc., should be included in group I; wet mosses, de- 

 caying nut shells, bracket fungi, herbaceous stems, etc., should be included 

 in group II. 



