Pileate and Clavate Tribes of Hymenomycetous Fungi. 87 



He has not however represented sporidia within them. In 

 1814 he represented sporidia within the thecse in Ag. pluteus, 

 and, amongst the thecae, urn-shaped bodies crowned with two 

 or three spicules. This was, in more modern times, the first 

 step, however distant, — for he does not consider them as hav- 

 ing any immediate connexion with the sporidia, but compares 

 them with the utricles in Coprini, — towards a knowledge of the 

 true arrangement of the spores in the rest of the Agarics. 

 Under Cantharellus villosus, Pers., thecae are also represented 

 as containing from one to three globose sporidia. 



Nees von Esenbeck's* important work appeared in 181 J. 

 His original designs of analyses of various pileate and clavate 

 genera are on the whole in perfect accordance with those co- 

 pied from Link. Under Thelephora ccesia, the figure of which 

 is copied from that of Persoon alluded to above, it is remarked 

 that the quaternary arrangement of the sporidia forms as it 

 were a prelude to that in Coprini. From this it should seem 

 that he regarded them as contained in thecae (asci) . 



Fries t in 1821 describes the asci generally in his Hymeno- 

 mycetes evoluti as "in superficie collocati immersi. Sporidia 

 in ascis seriatim disposita." Under Thelephora, /3 Phylacteria, 

 he writes, " Sporidia quaterna serie Coprinorum instar dispo- 

 sita." 



Dr. Greville { commenced his great work in 1823. Twenty 

 pileate and clavate Fungi are there more or less analysed ; the 

 figures according entirely with the observations of Link, Dit- 

 mar, and Nees von Esenbeck. In 1825 Fries § separated The- 

 lephora from Aurlcularia on account of the quaternary ar- 

 rangement of the sporidia. Dr. Greville followed him in this 

 separation, but apparently did not understand Fries correctly, 

 as the asci of Thel. laciniata are figured as containing a single 

 row of four sporidia, whereas Bulliard figured to a certain 

 degree correctly their quaternary arrangement on a peduncle, 

 a fact which Fries could not have overlooked. Indeed expe- 

 rience has clearly shown that Dr. Greville must have been 



* System der Pilzeund Schwamme. Wurzburg, 1817. 

 f Systema Mycologicum, vol. i. p. 1. Gryphiswaldia?, 1821. 

 % Scottish Cryptogamic Flora. Edinburgh, 1 823, &c. 

 § Systema Orbis Vegetabilis, p. 1. Lundse, 1825. 



