THE LAND AND FRESHWATER MOLLUSKS indigenous to, or naturalized in, the British Isles. By LOVELL REEVE, F.L.S. Crown 8vo, 295 pp., Map, and 160 Wood-Engravings, 10_s_. 6_d_. A complete history of the British Land and Freshwater Shells, and of the Animals which form them, illustrated by Wood-Engravings of all the Species. Other features of the work are an Analytical Key, showing at a glance the natural groups of families and genera, copious Tables and a Map illustrative of geographical distribution and habits, and a chapter on the Distribution and Origin of Species. -------------- CONCHOLOGIA ICONICA; or, Figures and Descriptions of the Shells of Mollusks, with remarks on their Affinities, Synonymy, and Geographical Distribution. BY LOVELL REEVE, F.L.S. Demy 4to, published monthly in Parts, 8 Plates, carefully coloured by hand, 10_s_. Of this work, comprising illustrations of Shells of the natural size, nearly 2000 Plates are published, but the plan of publication admits of the collector purchasing it at his option in portions, each of which is complete in itself. Each genus, as the work progresses, is issued separately, with Title and Index; and an Alphabetical List of the published genera, with the prices annexed, may be procured of the publishers on application. The system of nomenclature adopted is that of Lamarck, modified to meet the exigencies of later discoveries. With the name of each species is given a summary of its leading specific characters in Latin and English; then the authority for the name is quoted, accompanied by a reference to its original description; and next in order are its Synonyms. The habitat of the species is next given, accompanied, where possible, by particulars of soil, depth, or vegetation. Finally, a few general remarks are offered, calling attention to the most obvious distinguishing peculiarities of the species, with criticisms, where necessary, on the views of other writers. At the commencement of the genus some notice is taken of the animal, and the habitats of the species are worked up into a general summary of the geographical distribution of the genus. CONCHOLOGIA ICONICA IN MONOGRAPHS.