422 Rev. M. J. Berkeley and Rev. M. A. Curtis on new 



fragile, at first conical, tben convex, and finally depressed, viscid, 

 sordid brown, margin marked with prominent folds, rugose in 

 drying, the apex however remaining even. Stem 3-4 inches high, 

 slender, white with a silky lustre, fistulose, thickened at the base. 

 Veil none. Gills numerous, regular, shortly adnate, ventricose, 

 light ferruginous, at length saflFron-yellow from the spores. 

 Spores large, elliptic, subcymbiform. 



This species belongs to the same group as A. Ruderum, but dif- 

 fers from all in its sulcate pileus and bright saffron-yellow spores. 



15. Agaricus (Crepidotus) nephrodes, n. s. Pileo reniformi 

 pallide flavido-tomentoso ; stipite obsoleto; lamellis ventricosis 

 pileo concoloribus. Curt. no. 1912. On damp rotten logs. 

 South Carolina, H. W. Ravenel, Esq. 



Gregarious, sometimes imbricated. Pileus 1 inch or more 

 across, thin, suborbicular, reniform or subspathulate, plane, 

 clothed with a dingy yellowish-white down ; margin inflected, 

 flesh-white. Stem sometimes quite obsolete, but when present 

 very short. Gills pale like the pileus, gradually attenuated be- 

 hind. Spores globose, rosy ferruginous. 



This curious species has the habit of A. petaloides, especially 

 of North Carolina specimens, but differs materially in the coloured 

 spores, not to mention other points. 



16. Hiatula fragilissima, Rav. MSS. Pileo piano subumbo- 

 nato radiatim fisso marginibus rimarum luteo-pulverulentis in- 

 terstitiis candidis ; stipite luteo farcto ; annulo mobili ; lamellis 

 remotis. Curt. no. 2899. On earth and decayed vegetables on 

 the margin of swamps, H. W. Ravenel, Esq., July. 



Solitary or gregarious. Pileus 2-3 inches across, plane, very 

 thin and fragile, membranaceous, subumbonate, plicate, the edges 

 of the folds covered with yellow dust, deepening in colour towards 

 the centre, interstices white ; umbo darker, slightly viscid. 

 Stem 4-6 inches high, slender, somewhat bulbous, covered with 

 white down at the base, yellow, very fragile, fistulose, the cavity 

 stuffed with cottony fibres. Ring moveable. Gills white, thin, 

 and membranaceous, rather distant, ending abruptly at the 

 margin of a smooth area surrounding the top of the stem. Spores 

 white, obliquely elliptic, rather large. 



This, together with A. discretus, A. Benzonii, and one or two 

 species from Brazil, form the genus Hiatula of Fries, which is at 

 present unpublished. The outward resemblance of the species to 

 Coprinus plicatilis, especially when dry, is very strong, though the 

 more intimate characters are very different. The spores of C.pli- 

 catilis are much larger and broader, besides being very dark. 



^Montagnites Candollei, Fr. Ep. p. 211, var. Texensis-, minor 

 stipite transversim squamoso ; sporis paullo majoribus. Curt, 

 no. 3917. On sandy ground, Texas, C. Wright. 



