_On Waste Ground and Heaths._--Ceratodon purpureus, Funaria hygrometrica, Campylopus turfaceus, Bryum argenteum, nutans, and pallens, Pleuridium subulatum, Dicranella heteromalla and varia, Physcomitrium pyriforme, Pogonatum aloides, Polytrichum commune, piliferum, and juniperinum, Tortula unguiculata and fallax, Bartramia pomiformis, Jungermannia bicuspidata, Lepidozia reptans, Ptilidium ciliare, Frullania tamarisci. _Shady Banks and Woods._--Catharinea undulata, Weisia viridula, Tortula subulata, Mnium hornum, Dicranum scoparium, Hypnum rutabulum, velutinum, cupressiforme, prælongum, purum, and molluscum, Plagiothecium denticulatum, Pleurozium splendens and Schreberi, Hylocomium squarrosum and triquetrum, Thuyidium tamariscinum, Fissidens bryoides, Plagiochila asplenioides, Jungermannia albicans, Lophocolea bidentata. _In Bogs._--Sphagnum cymbifolium and acutifolium, Gymnocybe palustris, Hypnum cuspidatum, stellatum, aduncum, and fluitans, Jungermannia inflata. _Rocks and by Streams._--Grimmia apocarpa, Tridontium pellucidum, Hypnum serpens, filicinum, commutatum, and palustre, Scapania nemorosa, Metzgeria furcata, Marchantia polymorpha, Pellia epiphylla, Fegatella conica. _On Trees._--Ulota crispa, Orthotrichum affine and diaphanum, Cryphæa heteromalla, Homalia trichomanoides, Hypnum sericeum, Isothecium myurum, Frullania dilatata, Radula complanata, Madotheca platyphylla. Small as this list is, it will be found to yield ample store for investigation, and if true love for the study be thereby excited, the circle of forms will be found to widen with every new locality visited. If we have contributed in any way to facilitate the pursuit, then is our object fulfilled, and we may conclude with the words of Horace: Vive, vale! si quid novisti rectius istis, Candidus imperti, si non, his utere mecum. XII. FUNGI. By Worthington G. Smith, F.L.S.