Papers and Proceedings of the Royal Society of Tasmania for 1882-83 [The Society. 

 On the Mollusca procured during the 'Lightning' and 'Porcupine' Expeditions, 



1868-70, part vii., by J. Gwyn Jeffreys, LL.D., F.R.S., &c. [The Author. 



List of Shells obtained from the ' Basement ' Clay at Bridlington, by Dr. Gwyn 



Jeffreys, F.R.S., &c. [The Author. 



Proceedings of the Davenport Academy of Natural Sciences, vol. iii. , part iii., 



1879 — 81., [The Academy. 



Transactions of the Hertfordshire Natural History Society and Field Club, vol. ii., 



parts 7 — 9. [The Society. 



Proceedings of the Academy of Natural Sciences of Philadelphia, part i., Jan. — 



April, 1884. [The Society. 



Manual of Conchology, Structural and Systematic, by Geo. W. Tryon, Junr., 



part - [The Author. 



Annales de la Societe Royale Malacologique de Belgique, Tome xvii. , Troisieme 



Serie, Tome ii., 1882. [The Society. 



A New Classification of the Mollusca, by W. IL Dall. [The Author. 



Science, Nos. 74 — 85. [The Editor. 



Ji;.hn Hopkins' University Circular, vol. iii.. No. 31. [The University. 



Zoologischer Anzeiger, Nos. 172 — 176. [The Editor. 



Science Gossip, Aug., Sep., Oct, [The Editor. 



American Naturalist, Aug., Sep., Oct. [The Editor. 



Journal of the Cincinnati Society of Natural History, vii., No. 2. [The Society. 



Remarks on the Land Mollusca, with especial reference to their investigation in 



Hertfordshire, by J. Hopkinson, F.L.S. [The Author. 



List of Land and Freshwater Mollusca observed in Hertfordshire by Ada Selby, 



J. Gwyn Jeffreys, LL.D., F.R.S., &c., W. S. A. Griffith, F.R.C.S., and 



Alfred T. Brett, M.D. Compiled by J. Hopkinson, F.L.S. [The Compiler. 



Papers and Proceedings of the Royal Society of Tasmania for 1883. [The Society. 

 Proceedings of the Bristol Naturalists' Society, vol. iv., part 2. 

 List of Officers and Members, Annual Report, &c., of the Bristol Naturalists' 



Society.' [The Society. 



STRUCTURAL AND SYSTEMATIC CONCHOLOGY i 



AN INTRODUCTION TO THE STUDY OF THE MOLLUSCA, 



By GEORGE W. TRYON, Jun., 



Conservator of the Conchological Section of the Academy of Natural Sciences of Philadelphia. 



Includes the Anatomy and Physiology of the Mollusca, their Geographical and 

 Geological Distribution, Hints for Collecting and Preserving Specimens, Nomencla- 

 ture and Classification, followed by succinct accounts of all the Recent and Fossil 

 Genera and Subordinate Groups, and two Indices. 



It comprises, in three octavo volumes, about 1,200 pages, illustrated by 140 

 plates, containing over 3,500 figures, and a map ; forming the most complete 

 Conchological Text Book ever published. 



Fine Edition, duplicate plates, coloured and tinted, $45.00. Coloured Edition, 

 $33.00. Uneoloured Edition, $20.00. Cheap Edition, three volumes bound in 

 one, thin paper, $12.00. 



Address :— Geo. W. Tyron, Jun., Academy of Natural Sciences, Philadelphia, 

 U.S.A., or Truener & Co., 57 & 59, Ludgate Hill, London, England. 



THE SCOTTISH NATURALIST, 



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