CLAVIS AGAIIICINOIILM. HI 



without a ring, though at present none are described.* Weight is added 

 to this opinion by the fact that Fries has lately established a sub- 

 genus (Pilosace) amongst the Pmtellcs with these very characters (Plate 

 cm.). Till then Plnteus stood quite alone in structure. 



Hitherto no subgenus has been recognized amongst the SyporJiodii 

 analogous to Lepiota among the Leucospori, but such a group really 

 exists. In the ' Comraentario della Societa Crittogamologica Italiana,' 

 No. 2, September, 1861, there is an Agaric described as a doubtful 

 Pluteiis under the name of " A. (Pluteus ?) xonthogrammus, Ces." It 

 greatly resembles A. (Armillaria) mucidm, Fr., in aspect, and the 

 stem is furnished with a ring ; so that it fills up the vacant space in 

 the Hyporhodii. I propose for it the subgeneric name of Chamceota. 

 To it also belongs A. cretaceiis, Fr., A. ecli'matns, Koth, etc. A. 

 cretacetis, Fr., should not be referred to as intermediate between Lepiota 

 and Psalliota. It is singular that, with these unrecognized exceptions, 

 not a single rosy-spored Agaric is described as possessing a stem fur- 

 nished with a true ring, whilst in the Pratellae, every species in every 

 subgenus has a ring more or less manifest. 



Some species of the subgenus Grepidotus must be removed to the 

 space in the Hyporhodii, analogous to Pleurotns, as their spores are 

 rosy, and not brown. To this new and natural group I give the 

 name Claudopus. Mr. Berkeley's species of Pleurotus (?) with pink 

 spores belongs to this subgenus. "When Mr. Berkeley's book was pub- 

 lished, ten years ago, no species of the subgenus Eccilia were known 

 to be British ; now at least three are on our lists. 



III. Dermtni, Brown-spored Ayarics (Plate CII.). — In the Der- 

 mini, the blanks for unrepresented subgenera are more numerous. 

 There are no British species with the hymenophorum free from the 



* Since this paper lias been in print, I have i-eceived from Mr. Charles H. 

 Peck, of Albany, New York (under date Marcli 30, 1870), an interesting note 

 regarding a critical American Agaric. If his description prove correct, the 

 plant he mentions exactly fills the only vacant space amongst the Leucospori. 

 He says, in answer to my inquiries, " I have found what I have classed with 

 the Lepiota, a viscid, csespitose species, growing on old stumps close to the 

 ground, having no trace of veil or annulus, a circumstance in which it does not 

 agi'ce with other species of that subgenus so far as known to me." The habitat 

 of this Agaric, leaving out its striKJtural characters, does not agree with any 

 species of Lepiota, but is in correspondence with that of Pluteus, where the 

 annulus is also absent, and which is probably one of its analogues. Tlie liabi- 

 tats correspond in other analogous subgenera, as in Lepiota and Psalliota ; 

 Armillaria, PhoUota, and Stropharia, etc. 



