Notice. 



With the view of expediting the completion of the first volume, 

 and of publishing various communications that have been received, 

 double numbers will for the present be issued each quarter. 



Subscriptions for the present and next double numbers, 2/2, are 

 now due and should be at once forwarded to the Office. 



EXCHANGES. 



I have a number of Shells in duplicate, which I shall be glad to 

 exchange for any of the following, viz : — 



Arion flavus, Geomalacus maculosus, Limax laevis, Limax tenellus, 

 Succinea putris var. vitrea and solidula, Succinea elegans var. ochracea, 

 Vitrina pellucida var. depressiuscula and Dillwynii, Zonites fulvus var. 

 Mortoni, Zonites crystallinus var. complanata, or Helix aculeata var. 

 albida. — Philip B. Mason, F.L.S., Burton on Trent. 



I have a quantity of glass tablets for mounting shells upon, of vari- 

 ous useful sizes, which I shrill be glad to exchange for specimens of Brit- 

 ish or Foreign Shells (common species not objected to). -Address. M, 

 Office of the Journal, 9. Wade Street, Leeds. 



I have a few specimens of Helix limbata, H. fruticum, H. sylvatica, 

 Clausilia biplicata, C. parvula, and Bulimus detritus, for which I shall be 

 glad to receive other species. — J. W. Taylor, Leopold Square, Leeds. 



books pjooBrreD. 



Journal de Conchyliologie ; H. Crosse and P. Fischer: April and July, 

 1876, 8vo, pp. 80 and 96, and 6 plates. The Editors. 



Jafirbiicher der Deutschen Malakozoologischen Gesellschaft, nebst Nach- 

 richtsblatt; Dr. W. Kobelt; April and July 1876, 8vo, pp.. 94 and 

 86, and 6 plates. The Editor. 



Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft; Dr. W. 



Kobelt ; Nos. 4, 5, 6, 7, 8vo, pp. 48. The Editor. 



Descriptions of Four new species of Helix, with some notes on Helix 



Angasiana of Pfeiffer, by Geo. French Angas, F.L.S., C.M.Z.S., 



F.R.G.S., &c, (From P.Z.S., 1876), 8vo, pp. 4 and 1 plate. 



The Author. 

 On the Variation of Sculpture exhibited in the Shells of the Genus 



Nassa; by F. P. Marrat ; 8vo. pp. 8, 1876. The Author. 



Proceedings of the Boston Society of Natural History; 1876, parts 1 and 



2, 8vo, pp. 224 and t plate. The Society. 



(Continued on seventh page of cover. ) 



