Nor is this quite Rostafinski's species as cited. The spores are much smaller; Rostafinski says 10-12 or more, and calls for a distinctly netted capillitium, the surface strongly marked by abundant calcareous crystals. Ours may be a different thing. =5. Colloderma= _G. Lister_ 1910. _Colloderma, Jour. of Botany_, XLVIII., p. 312. Peridium double; the outer gelatinous, the inner membranaceous; capillitium intricate, limeless. COLLODERMA OCULATUM (_Lipp._) _G. Lister._ 1894. _Didymium oculatum_ Lipp., _Verh. Zo-Bot. Ges. Wien_, XLIV., p. 74. 1910. _Colloderma oculatum_ (Lipp.) G. List., _Jour. Bot._, XLVIII., p. 312. Sporangia gregarious, globose, or sub-globose, sessile or short-stipitate, olivaceous or purplish-brown, smooth and shining, the outer peridium gelatinous, thickened by moisture, hyaline; stipe dark brown; columella none; capillitium as in _Didymium_ purplish-brown, colorless at the tips; spores spinulose, fuscous, about 12 mu. New Hampshire, Europe. Our specimens from the late Dr. W. G. Farlow who collected it in New Hampshire. Swollen by immersion in water the sporangia take on an eye-like appearance, oculate, etc. =EXTRA-LIMITAL= PHYSARINA _von Hoehnel._ 1909. _Physarina_ von Hoehnel, _Akad. Wiss. Wien; Math-nat. KL._, CXVIII., p. 431. Sporangium wall rough with blunt spine-like processes, otherwise as _Diderma_. One species, _op. cit._, p. 432, _P. echinocephala_ v. Hoehn. Java. Might as well be called _Diderma echinocephalum_, one would think. Structure is that of _Leangium_. The striking character is a surface modification of the outer peridium, according to the description. ORDER II =STEMONITALES= Capillitium present, thread-like, arising in typical cases from a well-developed columella; spores in mass, black or violet-brown, more rarely ferruginous. =Key to the Families of Stemonitales= _A._ Fructification aethalioid, capillitium poorly defined; columella rudimentary or none AMAUROCHAETACEAE _B._ Fructification of distinct sporangia, capillitium well defined; the columella generally prominent, long and abundantly branched throughout STEMONITACEAE _C._ Sporangia distinct; capillitium developed chiefly or only, from the summit of the columella LAMPRODERMACEAE _A._ AMAUROCHAETACEAE Fructification aethalioid, an inch or two in diameter, in form varying with the habitat and place; capillitium dendroid, consisting of rather stout branches which rise irregularly more or less vertically from the hypothallus, branch repeatedly, often anastomose to form a network, especially toward the periphery; spores black. A single genus-- =1. Amaurochaete= _Rostafinski_ 1873. _Amaurochaete_ Rost., _Versuch._, p. 8.