192 THE MYXOMYCETES OF PICTOU COUNT?. MOORE. 



one or more series ; typically rupturing irregularly at the apex. 

 This family is represented in my collections by two species. 



Genus, Linbladia Fries. 



Sporangia compacted on a spongy hypothiallus in one or 

 more series, short, tubular. When in a single series sometimes 

 distinct and sihort stipitate. Peridium containing numerous 

 dark granules. Spores olivaceous. 



20. Linbladia effusa (Ehr.) Host. Sporangia compacted 

 in a thick spongy hypothallus in a single series (in all. of my 

 collections), tubular, about l mm high and .5 .75 mm in diameter, 

 almost black. Walls of the sporangia membranous with numer- 

 ous small, round, dark granules. Fructifications frequently 

 covering considerable areas, as large as 20 x 15 cm . Spores 

 almost colorless by transmitted light, smooth, 6.5 7 A 1 in 

 diameter. 



On decaying logs and on leaf mould in coniferous woods. 

 Common. 



Genus, Tubifera Gmelin. 



Fructification sethaloid formed of closely appressed cylindri- 

 cal sporangia seated on a well developed hypothallus. . The side 

 walls are grown together but the individual sporangia are never- 

 theless, clearly discernible. SpoTangia rupturing at the apex. 



21. Tubifera ferruginosa (Batsch Macbr. Sporangia long, 

 tubular, cylindrical or prismatic from mutual pressure, convex 

 above, appressed together to form a pulvinate sethalium, sessile 

 on a well developed hypothallus. Walls of the sporangia mem- 

 branous. Spore mass umber brown. The setlhalia may cover an 

 area of several square centimetres. The individual sporangia 

 are from 2 mm to 4 mm in height and about .5 mm in diameter. 

 Spores almost colorless by transmitted light, delicately reticu- 

 lated over the greater portion of their surface, 6.5 7 /A in 

 diameter. 



On decaying Psuga canadensis and other conifers. Common. 



