British Opisthobranch Molluscs
by T.E. Thompson and Gregory H. Brown
British Freshwater Bivalve Mollusca
by A.E. Ellis
British Prosobranchs was published in 1971, Land Snails and Opisthobranchs published in 1976, Freshwater Bivalves published in 1978 for the Linnean Society, by Academic Press, N.Y., in cardboard covers, about 5.25 by 8 inches in size, "British Prosobranchs" includes 112 pages, it is illustrated with drawings within the text Land Snails has 64 pages and contains drawings within the text. Opisthobranchs has 203 pages. The text is illustrated with black and white figures and has a color photograph as a frontispiece; Freshwater Bivalves contains 109 pages and has 13 full-page black and white photographs.
I have decided to list them as a set even though they sell separately for high prices. They share the same format and are part of the series "Synopsis of the British Fauna (New Series) as numbers 2,6,8 and 11. I am by no means an expert in the study of British mollusks, but these are excellent guides to the mollusks that they cover from what I see. These three books come from the library of Ken Emberton, formerly of the Academy of Natural Sciences in Philadelphia. The book's covers and pages are slightly toned, and the books' spines are sunburned. There is staining on the books' spines, and their edges on the covers caused by the glue used to bind the books.