Sporangia loosely gregarious, globose, purplish-brown, small, 1-1.5 mm. in total height, stipitate; stipe black, subulate, to 1 mm,; columella at first divided into a few main branches, from which by repeated subdivision the delicate, anastomosing, flexuose capillitial threads take origin; spores pale brownish-violaceous, spinulescent, 8-10 mu. South Carolina. Colorado:--_Dr. Sturgis._ 12. COMATRICHA RUBENS _Lister._ 1894. _Comatricha rubens_ List., _Mycet._, p. 123. Sporangia gregarious, globoid or ellipsoidal, 1-1.5 mm., pink-brown, stipitate; peridium persistent below; stipe .5-1 mm., black, shining; columella to more than half the sporangium, giving off on all sides the brownish-violaceous, flexuose threads of the capillitium, somewhat thickened and broadly attached to the persisting peridial cup; spores lilac-brown, spinulescent, 7-8 mu. Another border species, looking to the lamprodermas. Philadelphia, by courtesy _Mr. Bilgram_. 13. COMATRICHA PULCHELLA (_Bab._) _Rost._ PLATE XIII., Fig. 4, and PLATE XII., Figs. 16 and 16 _a_. 1837. _Stemonitis pulchella_ Bab., _Trans. Lin. Soc._, p. 32. 1841. _Comatricha pulchella_ Bab., Berk., _Ann. Mag. Nat. Hist._, I. vi., p. 431, Pl. XII., 11. _a._ _b._ 1848. _Stemonitis tenerrima_ Curtis, _Am. Jour._, VI., p. 352. 1873. _Stemonitis tenerrima_ Berk. & C., _Grev._, II., p. 69. 1876. _Comatricha pulchella_ (Bab.) Rost., _Mon. App._, p. 27. 1875. _Comatricha persoonii_ Rost., _Mon._, p. 201. 1894. _Comatricha persoonii_ Rost., List., _Mycet._, p. 122. 1899. _Comatricha pulchella_ (Bab.) Rost., Macbr., _N. A. S._, p. 129. 1899. _Comatricha persoonii_ Rost., Macbr., _N. A. S._, p. 132, _excl. syn._ 1911. _Comatricha pulchella_ Rost., List., _Mycet., 2nd ed._, p. 156. 1911. _Comatricha pulchella_ var. _gracilis_ Wing., List., _Mycet., 2nd ed._, p. 156. Sporangia very minute, 1 mm. high, scattered, ovate or ovate-cylindric acuminate, pale brown or ferruginous, stipitate; stipe short, black, nearly even; hypothallus none, or merely a circular base to the tiny stem; columella straight, gradually tapering, reaching almost if not quite to the apex of the sporangium; capillitium dense, a network of flexuous brown threads, rather broad within, ending in slender tips without; spore-mass brown, spores by transmitted light pale "lilac brown," or pale ferruginous, minutely but uniformly warted, 6-8 mu. Probably widely distributed but rarely collected. Pennsylvania, Iowa; _Okoboji_. Toronto,--_Miss Currie._ 14. COMATRICHA ELLISII _Morg._ PLATE XII., Figs. 15 and 15 _a_. 1894. _Comatricha ellisii_ Morg., _Jour. Cin. Soc._, p. 49. 1899. _Comatricha laxa_ Rost., Macbr., _N. A. S._, p. 127. 1911. _Comatricha nigra_ Schroet., List., _Mycet., 2nd ed._, p. 152.