Sporangia loosely gregarious, very small, .2-.3 mm. in diameter, yellow ochraceous, stipitate, nodding; stipe comparatively stout, dark brown or blackish, tapering upward, often twisted at the apex as in _D. cancellatum_; calyculus none, represented by simple ribs which give off at intervals free or floating branchlets before blending into the common net; net well developed, the meshes large, the nodes small, irregular, though often rounded and prominent, black, connected by delicate transparent threads, with free ends few or none; spore-mass yellow, fading to ochraceous; spores pale, smooth, globose, 6-7 mu. This species resembles at first sight the preceding, and has been often mistaken for it. As a matter of fact, the distinctions are generally very sharp. In the first place, the sporangia, when carefully measured, are seen to be not more than half as great in diameter; the meshes of the net, on the other hand, are much wider, the whole structure more compact. The nodules are like those of _tenella_, but are much fewer. The stipe is shorter, the cup wanting, and the costae are few and simple. The color suggests _C. aurantiaca_. The habitat and distribution as _C. tenella_. To anyone who will read the account of the species as given by the English _Mon., 2nd ed._, p. 183, it is immediately apparent that the author has in mind a different form from that seen and described in our territory and previously noted by the authors of Europe. These from Schrader down, agree in portraying a brunescent form with yellow spores; Mr. Lister enters it with the cyanic series and so describes and figures it throughout. Schrader figures a nut-brown species; Rostafinski uses that descriptive term in connection with the general appearance when fresh, but gives the spore-mass yellow; only in the stipe does he find another tint, nut-brown-purple. The figure, 145 in the _Monograph_ now before us portrays, except in color, our _C. tenella_ exactly. Dr. Rex, _Bot. Gaz._, XIX., 398, compares the present species with _C. minutissima_, and _C. tenella_ with _C. dictydioides_; which is correct for the American presentation of the species named. _C. dictydioides_ is certainly our presentation of _C. intricata_, a geographic species at the least; but if _C. microcarpa_ is purple we have of it no representation; our forms under that name are closely related to _C. tenella_, a yellow-spored species, and might perhaps be there referred; have, however, somewhat larger spores. 12. CRIBRARIA VIOLACEA _Rex._ PLATE XVII., Fig. 8. 1891. _Cribraria violacea_ Rex, _Proc. Phil. Acad._, p. 393.