MOULDS REFERFvED BY AUTHORS TO FUMAGO. 251 



come nearest to it in habit and characters. VTe do not doubt 

 tliat we shall soon obtain better specimens from Mr. Curtis, now 

 his attention has been called to the genus. Schweinitz's Dema- 

 tium Fuligo comprised probably several species ; in his later and 

 larger list he considered it the same with Cladosporium Fumago^ 

 Lk., which is clearly a mistake, and shows that he had not any 

 definite notions as to ids species. 



3. C. salicinum, Mont. Velutinum ; peridiis hie illic parce 

 furcatis, brevibus ; sporidiis oblongis septatis articidis constrictis, 

 longitudinaliter divisis. Mont, in Ann. of Nat. Plist., 2nd series, 

 vol. iii. p. 520. 



On leaves of Willows of the section Cinerella. Switzerland, 

 RoiFavier. Paris, Uurieu de Maisonneuve. We have it also, 

 but in a barren state, from Dr. Leveillt?. 



Forming a thin, even, velvety black stratum, wliicli even under 

 a lens appears but slightly bri>tly. Mycelium moniliform, the 

 articulations containing a single nucleus.* Peridia rather short, 

 often obtuse, but sometimes lageniform and acuminate, sparingly 

 forked, sometimes fringed (fig. 4). Asci broad, obtuse. Sporidia 

 oblong, very slightly curved or oblique, oblong, triseptate, with 

 one or two longitudinal septa constricted at the articulations. 

 Occasionally tlie sporidia are obovate. 



This is distinguished from the following species by its less 

 elongated peridia, in consequence of wliicli the stratum is velvety, 

 and not distinctly bristly to the naked eye. 



4. C. elongutum. Berk, and Desm. Setosum ; peridiis elongatis 

 acuminatis utplurimum simplicibus finibriatisque .sporidiis 2-3 

 septatis articulis demum constrictis quandoque longitudinaliter 

 divisis. Curt. No. 1634. 



On Populus nngiilata. Santee River, South Carolina. II. 

 W. Ravenel, Esq. (Fig. 5.) 



Forming a scattered setose black stratum ; mycelium monili- 

 form. Peridia very much elongated, acuminate, generally 

 simple ; orifice mostly fimbriated. Sporidia at first oblong bi- 

 triseptate, at length broader, with the articulations constricted 

 and the central one longitudinally .'^eptate. Intermediate between 

 the foregoing species and that which follows, agreeing with the 

 former in its more simple peridia, with the latter in its setose 

 stratum. 



5. C. Persoonii, Berk, and Desm. Setosum ; peridiis con- 

 fertis, subramosis quandoque irregularibus ; mycelio moniliforme ; 

 articulis saepe oblongis uniseptatis. Polychteton Avellance, Desm. 



* Mr. Broome has observed two curious appearances in the filaments. In 

 one case a few filaments were subulate with a central cavity, two-thirds of 

 which was filled with short moniliform endochromes : in the other, the 

 outer coat was very delicate, loose, and transversely striate. 



