858 NOMENCLATURE OF BRITISH PYRENOMYCETES. The plant, which has been broken off below the pair of leaves, is 20 cm. high. The leaves, which are papery when dry, have a rather long sheathing base (3 cm.), passing somewhat abruptly into the blade (8 x 4*5 cm.). The scape is 15 cm. long, the raceme occupying its upper half. The delicate 1 -nerved bracts are 7-8 mm. long; the pedicel with the decurved ovary reaches in the lowest flowers 1-5 cm. The dorsal sepal is 6 x 2*5 mm., the laterals 6 X 3-5 mm., the petals 65 x 1-75 mm. The large flattened lip measures 1 cm. each way. The column including the small heart- shaped anther is 2 mm. long, and is produced on each side of it into a short bluntly-rounded incurved arm. Approaches M. purpurea Lindl., from Ceylon and Java, but is at once distinguished by its large round lip. The flowers are also larger. Zeuxine Whiteheadi, sp. nov. Herba foliis glabris ovatis subradicalibus ; scapo pubescente elongato ; spica brevi pauciflora ; bracteis lanceolatis ovarium paullo excedentibus ; floribus pro genere magnis ; sepalis petalisque uninerviis subaequalibus, sep. dorsali oblongo-lanceolato, lateralibus oblongo-ligulatis, petalis oblongis basi angustatis, labelli ungue cum basi saccata, glandula bina carnosa rotundata includente, et marginibus membranaceis inflexis, alis orbicularibus crispulatis ; columna brevi, processubus anteriori- bus parallelis latis apice angustatis, anthera ovato-lanceolata. Hab. Mindoro Is., Mt. Dulangau. A slender plant 24 cm. high, leaves 2 cm. long by a little more than half as broad; the slender' sterile bracts 10-13 mm. long; amplexicaul below, narrow and pointed above ; fertile bracts free, lanceolate, with ciliolate margin, 8*5 mm. long, decreasing up- wards, spike scarcely 2*5 cm. long; dorsal sepal 5*5 x 2 mm., lateral sepals 6 X 2*5 mm., petals 5-5 x 2*5 mm., lip 5 mm. long; claw darker in colour, with delicate infolded upper edges, 2*5 mm. broad ; limb abutting directly upon the claw (4-5 mm. broad) of two roundish wings with crisped undulating margin. A distinct species, perhaps nearest to Zeuxine affinis Benth., differing in its short spike, larger flowers, and especially in its lip- characters. NOMENCLATUEE OF BEITISH PYRENOMYCETES. By Annie Lorrain Smith. The large and important group of the Pyrenomycetes has recently been added to the exhibition of British Fungi in the Natural History Museum. Drawings illustrating the genera have been placed on the cards, and, as far as possible, the plants are exhibited with descriptions of each species. There has been hitherto no complete compilation of the orders for Great Britain, and the records of species have been drawn from various published lists. The arrangement mainly followed has been that adopted by Winter in Rabenhorst's Cryptogamic Flora.
