IMPORTANT SCIENTIFIC WORKS 



the species of that portion of the Animal Kingdom have been named 

 three times over. This is not, however, the case with Shells ; the no- 

 menclature of Conchology cxhit)its a very tolerable degree of piu'ity, 

 and it is confidently hoped that the present eftbrt to maintain it will 

 prove effectual. 



The plan adopted in ' The Conchologist's Nomenclator is that 

 of an alphabetical list of species, in a systematic arrangement of Genera; 

 a line is devoted to each species, the specific name being followed by 

 that of the authoi", and the author's name by references to description 

 and figure ; and the synonymes are added at discretion. "Where there 

 is not sufficient space in the line to insert both the description and 

 figure references, a preference is given to the latter, as being the better 

 means of identification. 



To him w^hose attention is directed to naming shells, a carefidly ar- 

 ranged Nomenclator is of great scientific importance ; instead of being 

 di'iven to the ^'oluminons writings of the last century to learn what 

 species have been described, and what particidar names have been used, 

 he is at once presented with m\ epitome of aU that he is in search of. 

 To the less ambitious laljom-er, the amatem* collector of Shells, the 

 'Conchologist's Nomenclator' is of triple usefulness; it supplies 

 him wdth a Register or ]\Iarker, it furnishes him with labels for his 

 specimens, and it shows him his desiderata. 



Just publislicd at a reduced price. 



CONCHOLOGIA SYSTEMATICA, 



OR 



SYSTEM OF CONCHOLOGY: 



IN WHICH THE LEPADES AND MOLLUSCA ARE DESCRIBED AND CLASSIFIED 

 ACCORDING TO THEIR NATURAL ORGANIZATION AND HABITS j 



By LOVELL reeve, A.L.S., F.Z.S., Etc. 



WITH 300 HIGHLY-FINISHED COPPER-PLATE ENGRAVINGS, 



BY MESSRS. SOWERBY; 



CONTAINING 1500 FIGURES OF SHELLS. 



A- Tabula Methodlca, showing the distribution of the Genei-a at one 

 view, is given at the commencement ; and every genus is then faithfully 



