This genus is set up for the accommodation thus far of the single species following. It differs from _Physarella_ in the apparently constant discoidal shape, absence of trabecules, etc. TRICHAMPHORA PEZIZOIDEA _Jungh._, _op. cit._ 1838. _Trichamphora pezizoidea_ Jungh., _op. cit._ 1854. _Didymium zeylanicum_ Berk. & Br., _Hook. Jour. Bot._, VI., p. 230. 1869. _Physarum macrocarpum_ Fuckel, _Symb. Myc._, p. 343. 1875. _Chondrioderma pezizoidea_ Rost., _Mon._, p. 424, tab. VIII., Fig. 122. 1876. _Badhamia fuckeliana_ Rost., _Mon._, _App._, p. 2. 1894. _Trichamphora pezizoidea_ Jungh., List., _Mycetozoa_, p. 89. 1911. _Trichamphora pezizoidea_ Jungh., List., _Mycetozoa, 2nd ed._, p. 90. Sporangia discoidal or saucer-shaped, gregarious, stipitate, erect or nodding, grayish-white, the peridium thin, breaking irregularly and persistent; stipe subulate, striate, reddish brown, transparent; capillitium variable as above stated; spores pale violet-brown, spinulose or nearly smooth, about 9 mu. In _Mycetozoa, 2nd ed._, the spores are described as "dark or pale purplish brown, spinose, spinulose or nearly smooth, 9-17 mu in diameter." This would seem too great a variation even in this protean species. The only specimens in our herbarium are from the Congo valley. The spores are pale and nearly smooth, as in _Tilmadoche alba_, and 9 mu. Spores 17 mu suggest immaturity; penultimate cell-division. The synonymy above cited shows how this species has impressed careful students. Doubtless in every case the reference is correct, judging from the specimen each author had before him, although it is hard to see how _Chondrioderma_ might have been suggested. The species is evidently tropical, though reported from Europe. =4. Craterium= _Trentepohl_ 1797. _Craterium_ Trentepohl, Roth, _Catal._, I., p. 224. Sporangia more or less distinctly cyathiform, stipitate, the peridium generally plainly of two layers or even of three, opening at the top by circumscission more or less definite, or by a distinct lid, the upper part calcareous often to a marked degree, the lower, cartilaginous, long persistent as a vasiform cup containing the capillitium and spores, the calcareous nodes aggregating more or less to form a pseudo-columella.