—45— 



56. Thuidium minutulum (Hedw.) Bryol. Eur. On log. 



57. Thuidium Blandowii (W. & M.) Bryol. Eur. On soil of tamarack swamp. 



58. Thuidium delicatulum (L.) Mitt. On soil of tamarack swamp. 

 St. John's University, Collegeville, Minnesota. 



Fig. I. — Leocarpus fragilis (Dicks.) Rost. growing on the leaves of Dicranum 

 fulvum Hook. Drawing by Mrs. Eva B, Gadsby. 



SLIME MOULD GROWING ON A MOSS 



George B. Kaiser 



In climbing Wittenburg (3,802 ft.) in the Southern Catskill Mountains of 

 New York on the nth of August, 1912, my attention was arrested by mats of 

 Dicranum fulvum Hook, upon whose leaves were growing clusters of what ap- 

 peared to be glossy brown ovoid capsules. Upon further investigation these 

 clusters were found to be the fructifications of a Myxomycete, which was later 

 determined by Frank J. Keeley as Leocarpus fragilis (Dicks.) Rost. — a synonym 

 of Leocarpus vernicosus Link. This slime mould rather frequently occurs on 

 dead leaves, but seems to grow rarely on mosses. I have never at any other time 

 made a like collection. 



