Most of the genera of _Auricularini_ are cosmopolitan, and the same is true of some species of _Stereum_, of _Corticium_, etc., which are met with in countries of the most different geographical position. In tropical countries, these genera of fungi assume the most curious and luxuriant forms. The single and not considerable genus _Cyphella_ appears to be pretty uniformly distributed over the globe. The _Clavariæi_ are equally universal in their diffusion, although more plentiful in the north; however, the genus _Pterula_ possesses several exotic forms, though in Europe it has but two representative species. That beautiful genus of _Hymenomycetes_, _Sparassis_, occupies a similar place next the _Clavariæi_, and is peculiarly a production of the temperate zone and of the coniferous region. The fungi which constitute the family of _Tremellini_ prevail in Europe, Asia, and North America, and exhibit no marked differences amongst themselves, notwithstanding the distances of the several countries apart. It must, however, be stated that the _Hirneolæ_ for the most part inhabit the tropics. We come now to the _Gasteromycetes_--an interesting family, which exhibits several ramifications or particular series of developments. The most perfect _Gasteromycetes_ almost exclusively belong to the warmer division of the temperate, and to the tropical zone, where their vegetation is the most luxuriant. Of late the catalogue of these fungi has been greatly enriched by the addition of numerous genera and species, proper to hot countries, previously unknown. Not uncommonly, the exotic floras differ from ours, not merely in respect of the species, but also of the genera of _Gasteromycetes_. It must, besides, be observed that this family is rich in well-defined genera, though very poor in distinct specific forms. Among the genera found in Europe, many are cosmopolitan. The _Phalloidei_ present themselves in the torrid zone under the most varied form and colouring, and comprise many genera rich in species. In Europe their number is very restricted. As we advance northward they decrease rapidly, so that the central districts of Sweden possess only a single species, the _Phallus impudicus_, and even this solitary representative of the family is very scarce. In Scania, the most southern province of Sweden, there is likewise but one genus and one species belonging to it, viz., the _Mutinus caninus_. Among other members of the _Phalloidei_, may be further mentioned the _Lysurus_ of China, the _Aseröe_ of Van Diemen's Land, and the _Clathrus_, one species of which, _C. cancellatus_, has a very wide geographical range; for instance, it is found in the south of Europe, in Germany, and in America; it occurs also in the south of England and the Isle of Wight; whereas the other species of this genus have a very limited distribution.