[C] In _Paxillus involutus_ the hymenium may be readily torn off and unfolded. [D] This was well delineated in "Flora Danica," plate 834, as observed in _Coprinus comatus_ as long ago as 1780. [E] A. de Bary, "Morphologie und Physiologie der Pilze," in "Hofmeister's Handbuch," vol. ii. cap. 5, 1866, translated in "Grevillea," vol. i. p. 181. [F] "Die Pollinarien und Spermatien von _Agaricus_," in "Botanische Zeitung," Feb. 29 and March 7, 1856. [G] "Essai d'une Flore mycologique de la Région de Montpellier." Paris, 1863. [H] Hoffmann, "Botanische Zeitung," 1856, p. 139. [I] Corda, "Icones Fungorum hucusque cognitorum," iii. p. 41. Prague, 1839. [J] Cooke, M. C., "Anatomy of a Mushroom," in "Popular Science Review," vol. viii. p. 380. [K] An attempt was made to show that, in _Agaricus melleus_, distinct asci were found, in a certain stage, on the gills or lamellæ. We have in vain examined the gills in various conditions, and could never detect anything of the kind. It is probable that the asci belonged to some species of _Hypomyces_, a genus of parasitic Sphæriaceous fungi. [L] It is not intended that the spores are always quaternate in _Agaricini_, though that number is constant in the more typical species. They sometimes exceed four, and are sometimes reduced to one. [M] The species long known as _Hydnum gelatinosum_ was examined by Mr. F. Currey in 1860 (_Journ. Linn. Soc._), and he came to the conclusion that it was not a good _Hydnum_. Since then it has been made the type of a new genus (Hydnogloea B. and Br. or, as called by Fries, in the new edition of "Epicrisis," _Tremellodon_, Pers. Myc. Eur.), and transferred to the _Tremellini_. Currey says, upon examining the fructification, he was surprised to find that, although in its external characters it was a perfect _Hydnum_, it bore the fruit of a _Tremella_. If one of the teeth be examined with the microscope, it will be seen to consist of threads bearing four-lobed sporophores, and spores exactly similar to _Tremella_. It will thus be seen, he adds, that the plant is exactly intermediate between _Hydnei_ and _Tremellini_, forming, as it were, a stepping-stone from one to the other. [N] Tulasne, L. R. and C., "Observations on the Organization of the Tremellini," in "Ann. des Sci. Nat." 3^me sér. xix. (1853), pp. 193, &c. [O] M. Léveillé, in "Ann. des Sci. Nat." 2^me sér. viii. p. 328; 3^me sér. ix. p. 127; also Bonorden, "Handbuch der Mycologie," p. 151. [P] Tulasne, in "Ann. des Sci. Nat." (loc. cit.) xix. pl. x. fig. 29. Tulasne, "New Notes upon Tremellinous Fungi," in "Journ. Linn. Soc." vol. xiii. (1871), p. 31.