( 505 ) XXX. A Supplement to the '^ Synopsis of Testaceous Pneumono-branchous Mollusca of Great Britain." By John Gwyn Jeffreys, Esq., F.L.S. Read June 21, 1831. More extensive opportunities and the assistance of scientific friends enable me to offer a few remarks, by way of addition and correction to the list of Mollusca which the Society lately did me the honour of publishing in their Transactions. Except in a verj?^ few instances I shall, as before, only notice such habi-tats for the species as have fallen under my own observation, or oeen communicated to me by others. SUCCINEA. S. putris var. a. Linn. Trans. Soc. vol. xvi. p. 325. Mr. Alder, in a valuable paper on the land and freshwater shells of Newcastle-upon-Tyne, which is to be found in the first volume of the Transactions of the Natural History Society of that place, describes this variety under the specific name of oblonga. Dr. Leach fell into the same mistake ; and has moreover, in his inedited work on the British Mollusca, referred it to the S. ob-longa of Draparnaud. It is a very variable species. S. oblonga, p. 325. Sparingly in ditches on Braunton Burrows, North Devon. I observed specimens in the Hon. Lady Elizabeth Finch's collec-3 T 2 tion
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