Sturgis : New or Rare Myxomycetes 



329 



That this is the " Lachnobolus cribrosus" of Fries appears to 

 me fairly certain, and with this view both Miss Lister and Pro- 

 fessor Macbride agree. The combination, Amaurochaete cri- 

 brosa (Fr.) appears never to have been published. 



Cribraria tenella Schrad. Specimens of this common 

 species were found in December, 1898, at Palm Beach, Florida, 

 by Professor Thaxter. They are noteworthy as being the " very 

 small neat variety" noted by Miss Lister (Mon. Mycet.. Ed. 2, 

 p. 181) as occurring in this country and in Dominica. The 

 variety bears a very close resemblance, except in color, to C. 

 microcarpa. 



Cribraria violacea Rex. A rather abnormal form of this 

 species was found by Professor Thaxter on pig-dung and on 

 wood at Eustis and Cocoanut Grove, Florida, in September and 

 November, 1897. In both gatherings the apical portion of the 

 sporangia consists of large polygonal, membranous fragments, 

 connected by many very delicate threads. Only occasionally are 

 any thickened nodes apparent. 



Cribraria purpurea Schrad. This rare species occurred in 

 considerable abundance on coniferous wood in the Wet Mountain 

 Valley, Colorado, in August, 191 3. It was collected as Dic- 

 tydium, its true character appearing only upon microscopic ex- 

 amination. From C. elegans Berk. & Curt., it differs in its larger 

 size, the surface-net with variously expanded nodes, and the 

 minutely spinulose spores. These characters, however, are not al- 

 together distinctive ; the present gathering shows a certain blend- 

 ing of the two, and it is not unlikely that further gatherings of C. 

 elegans may show that it is only a small form of C. purpurea. 



Enteridium minutum sp. nov. PL 1 5. Plasmodium ? Aetha- 

 lia rounded or elongate, pulvinate, pale umber in color, seated on 

 a broad membranous base, 1.5-2 mm. in diameter; wall wrinkled 

 and usually marked with small, scattered pits, pale-yellow, mem- 

 branous. Walls of the component sporangia membranous, 

 minutely roughened, perforated with round openings, the margins 

 of which show many free threads ; or reduced to irregular, an- 

 astomosing strands arising from the base of the aethalinm, 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 in diameter. 



