aT) QOWERBY, 12 1, FULHAM ROAD, London, S.W. 

 • jDt ^ (Removed from 45, Great Russell Street), has 

 probably the Largest STOCK OF RECENT SHELLS of any dealer in the 

 world, from which seleptions may be made on the premises or specimens sent for 

 selection, 



COLLECTIONS Illustrative of Generic and Sub-generic Forms, and Species, 

 from 100 to 5,000 species from £1 los. to £2)00. 



Museums, Private Collections, and Specimens Classified, Named, and 

 Arranged. 



THESAURUS CONCHYLIORUM, by G. B. Sowerby. Part 44 (com- 

 pleting the Fifth Volume) contains a completion of the Monographs of the Genera 

 CONUS and VOLUTA, with Thirteen Coloured Plates. Price, £1 5s. 



ILLUSTRATED INDEX OF BRITISH SHELLS. New Edition, 

 Enlarged and Revised, with Twenty-six Coloured Plates, giving a figure of every 

 known British species. Price, £1 \'l)S. 



THE SCOTTISH NATURALIST, 



A QUARTERLY MAGAZINE OE NATURAL SCIENCE. 

 Edited by Professor Trail, Aberdeen. 

 Annual Subscriptions, payable in advance, 4s. 6d. , post free. 

 Articles and communications for the Magazine should be sent to the Editor 

 before the ist of December, March, June, or September, if intended for publication 

 in the January, April, July, or October numbers respectively. 



Orders for copies, subscriptions, &c., should be sent to S. CowAN & Co., Perth, 

 from whom also Terms for Advertising nfiay be had. 



THE MARINE MOLLUSGA OF ROUSILLON: 



DESCRIPTIVE AND SYKOKYMIC. 



FORMING ONE YOLUME, ACCOMPANIED BY PHOTOGRAPHIC PLATES. 



By E. BUCQUOY and M. DAUTZENBERG. 



Price 4 FRANCS PER PART, Payable on Receipt of Part. 



The work will be completed in 8 or 10 parts, and 5 photographic plates in each part. 

 Subscriptions to be sent to 



M. PH. DAUTZEITBBEG, 213, rue de I'Universite, Faris. 



EXCHANGE. — Duplicates Sph. ovale, L. glabra, Pis. Amnktim^ 

 and other good local formsof Anodons, Unios, &c. Wanted, 

 Helix fusca, If. revelata, Siiccinea oblonga or virescens, L. ijivohita, 

 Vertigo alpestris, augustior, and pusilla, &c. — John R. B. Masefield, 

 Rosehill, Cheadle, Staffordshire. 



IBOOICS lE^EOEI-VED. 



A complete catalogue of British MoUusca compiled from Jeffrey's British Conchology, 



with alterations and additions to date by Charles Jeffery [The Publisher. 



J. Ricci di Mare nell 'editto di Drocleziano, by A. Statuti 



Proceedings of the Academy of Natural Sciences of Philadelphia, part i, ii, 1887 [The Society. 



The Naturalists' World, edited by Percy Lund, Oct., 1887 [The Editor. 



The Naturalist, edited by Roebuck and Clarke [The Editors. 



The Science Monthy, edited by Dr. J. W. Williams _ [The Editor. 



Jahrbiicher d. Deutschen Malakozoologischen Gesellschaft, edited by Dr. Kobelt [The Editor. 



Journal de Conchyliologie, edited by Crosse and Fischer [Tbe Editor. 



Catalog der Conchylien-Sammlung von Fr. Paetel, Lieferungen 3, 4 and 5 [The Publisher. 



The Scottish Naturalist, edited by Prof. Traill, October, 1887 _ [The Editor. 



Uber die Genitalentwicklung der Pulmonaten und die Fortpflanzung des Agriolimax 



Iffivis, by H. Simroth [The Author. 



Proceedings of the British Naturalists' Society, New Series, vol. v., part 2, 1886-7 [The Society. 



The Transactions of the Hertfordshire Natural History Society, vol. iv., part 7 [The Society. 



Les Mollusques Marins du Roussillon par Bucquoy, Dautzenberg and Dollfuss — 



Tome ii., Fasc. i, Pelecypoda [The Author. 



Bulletin de la Soci^t^ Malacologique de France, Tome iv. [The Society. 



