THE SLIME MOLDS OF OHIO 
39 
pseudo-capillitium, the remains of the sporangium walls, consists of irregu¬ 
lar flat branching plates arising from the hypothallus and which give rise 
above to many slender flattened brown threads. Spores spherical or top 
shaped, reticulated over the greater part of the surface, warted on the 
remainder, 6 to 8mmm. in diam. 
Erie Co., (Miami Valley—Morgan), (Columbiana Co.—Lloyd Herb.). 
(Licking Co.—Oberlin College Herbarium). 
3. ENTERIDIUM Ehrenberg. 
Enteridium rozeanum Wing. Plate VII, Figs. 3, 3a, and 3b. 
Confluent sporangia interwoven into an aethalium. Sporangium walls 
perforated by large openings. Capillitium absent. 
1. E. rozeanum Wing. Aethalium hemispherical or pulvinate, 1 to 
5cm. in diam., brown. Sporangium walls perforated by large openings, 
forming a network of broad membranous bands. Spores brown, reticulated 
on two-thirds of the surface, the remainder nearly smooth, 7 to 9mmm. in 
diam. 
Erie Co., Cuyahoga Co., (Miami Valley—Morgan), (Ohio—Lister), 
(Lorain Co.—Oberlin College Herbarium). 
ORDER 4. TRICHIALES. 
Sporangia distinct or combined into aethalia. Lime not present. 
Capillitium present consisting of threads, tubular or solid, smooth, wrinkled, 
or variously sculptured. 
EAMILY 9. MARGARITACEAE. 
Sporangia distinct, usually sessile. Sporangium wall single, smooth, 
usually translucent. Capillitium consisting of solid threads, either coiled 
and hair like, or nearly straight and attached to the sporangium walls, 
simple or branching at an acute angle. 
A small family of Slime Molds with the few species distributed among 
four genera, none of which have been reported from Ohio. The two 
following are the only American forms. 
Dianema harveyi Rex; having small sessile bronze colored sporangia 
and a capillitium consisting of straight slender threads, unsculptured and 
attached both above and below to the sporangium wall has been found in 
Maine. 
Prototrichia metallica (Berk.) Mass, is found in our Pacific Coast 
States and differs from Dianema in having the threads of the capillitium 
stout and marked by from two to four spiral bands. 
