MANUAL OF CONCHOLOGY; 



STRUCTURAL AND SYSTEMATIC. 



WITH ILLUSTRATIONS OF THE SPECIES 



By GEORGE W. TRYON, Junr., 



Conservator of the Conchological Section of the Academy of 

 Natural Sciences of Philadelphia. 



Vol. I., Cepalopoda, 1879. Vol. II., MuRiciN^, and Purpurin^, 1880. 

 Vol. III., Tritonid^, Fusion, and Buccinidve, 1881. Vol. IV., Nassid^, 

 Mitrid^, Olivid^, &c., 1882. 



CONDITIONS. 



The Manual of Conchology will be published, by subscription, in parts 

 (in octavo form), of which about four will constitute a volume. Each part will 

 embrace from 16 to 24 plates, with accompanying text. Each volume will be com- 

 plete in itself, and will be furnished with appropriate title-page, index, etc. Part I, 

 to be issued January ist, 1879, will commence the history of the Cephalopoda ; the 

 Muricidse will follow. 



It is impossible to predicate the length of time that will be required to complete 

 the work ; it will certainly occupy several years. Subscriptions will be revocable 

 on the completion of any volume. 



*^* Only 250 copies will be published ; including three styles, as follows ; 

 Fine Edition. — The text will be printed on heavy plate paper, and the plates will 



be in duplicate, colored and India tinted. Edition strictly limited to 25 copies.) 



Price, per Part, ... .. ... ... ... ... $8 00 



Colored Edition. — The plates carefully colored by hand. Per Part, ... 500 

 Plain Edition. Per Part, ... ... ... ... ... 300 



American subscribers will please address 



GEO. W. TRYON, Jr., 

 Academy of Natural Sciences^ Philadelphia, Pa. 

 Foreign subscriptions may be sent to either of the following booksellers ; 

 Trubner & Co., 57, 59 Ludgate, Joseph Baer & Co., Frankfurt am Main. 



London. H. Georg, Rue de Lyon 65, Lyons, 



F. Savy, 77 Boul. St. Germain, Paris, France. 



A. Asher & Co., 53 Mohrenstrasse, H. Georg, Bale. 



Berlin. H. Georg, Corraterie No. 10, Geneva. 



C. Gerold's Sohn, Vienna. U. Hoepli, Milan, Naples and Pisa. 



*^* Subscribers for the current volume, can purchase completed volumes at the' 

 subscription price. Non-subscribers will be charged twenty-five per cent, advance 

 upon the subscription price for either of the volumes. 



BRITISH MARINE SHELLS.— A large quantity of duplicates 

 to exchange. List sent and requested. — C. Jefferys, Hill House, 

 Langharne, Carmarthenshire. 



WANTED. — Authenticated specimens of type and varieties of 

 Anodonta cygnea, A. anatina, Unio pictoruni, U. tumtdus^ 

 Sphceriuni corneum, and S. lacustre. Shells, or mounted palates in 

 exchange. — J. D. Butterell, John Street, Beverley. 



