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Cyrena obovata, Sowerby; fossil. Anodonta Cordierii; D'Orbigny; fossil. Anodonta latimarginata; recent. Unio littoralis. Lamarck; recent. Almost all bivalve shells, or those of acephalous mollusca, are marine, about sixteen only out of 140 genera being fresh-water.

Many of the marine shells of the brackish-water beds of the above series, both in the Isle of Wight and Hordwell Cliff, are common to the underlying Barton Clay: and, on the other hand, there are some fresh-water shells, such as Cyrena obovata, which are common to the Bembridge beds, notwithstanding the intervention of the St. Helen's series.

Linaria italica is a hybrid toad-flax between L. genistifolia and L. vulgaris, a cross which I have repeated in my garden. Drosera obovata is a hybrid sundew between D. anglica and D. rotundifolia. Primula variabilis is a hybrid between the two common primroses, P. officinalis and P. grandiflora.

The leaves are large, and silky on the undersides, while the flowers are crimson and white, and equally as large as those of the better-known M. grandiflora. Yulan. China, 1789. A large-growing shrub, with Pea-green, deciduous foliage, and large, pure white flowers that oft get damaged by the spring frosts. M. conspicua Soulangeana is a supposed hybrid between M. conspicua and M. obovata.

On this newly made, restricted strip one may peep and botanise without restraint, discovering that though it does not offer conditions at all favourable to the retention of moisture, plants of varied character crowd each other for space and flourish as if drawing nutriment from rich loam. Clerodendron inerme. Premna obtusifolia. Vitex trifolia. Vitex trifolia, var. obovata. Terminalia melanocarpa.

It is usually seen as a wall plant, and the slight protection thus afforded is almost a necessity in so far as the development of the foliage and flowers is concerned. M. LENNEI. This is a garden hybrid between M. conspicua and M. obovata discolor, and has flowers as large as a goose's egg, of a rosy-purple colour, and produced profusely. M. MACROPHYLLA. North America, 1800.