Historical Account of Testaceological Writers. 189 



descriptions of Geoftroy; they contain figures of forty-six shells 

 (with French names correspondent to Geoffroy's system), all found 

 in the environs of Paris. 



Many valuable experiments and observations, tending to throw 

 light on the physiology and pathology of the Snail tribe, are to 

 be found in the Journal des Scavans for 1770. They were com- 

 menced in the year 1768 by 



COTTE, 

 and continued in the Journal de Physique. 



WALLIS, 



the historian of Northumberland, includes the Testacea in his ac- 

 count of the natural productions of that county, adding copious 

 synonyms from Lister, Petiver, and Linnaeus; but the number of 

 species described is only eight. 



The commencement of the great conchological work of 



MARTINI, 



in the year I769, may be considered as forming a sort of epoch 

 in the history of that science, it being the most copious, labori- 

 ous, and valuable publication on the subject of shells that has 

 hitherto appeared. Only three volumes, however, were completed 

 by this author; the other seven came from a Danish clergyman, 



J. II. CHEMNITZ, 



by whom the undertaking was concluded in 1788. The " Neues 

 Si/stematisches Conc/u/lien Cabinet" contains 366 plates, exhibiting 

 no fewer than 3711 figures, besides vignettes, &c. which are all 

 faithfully drawn, and coloured with the utmost accuracy. In the 

 9th volume are many South Sea species, which had never before 

 been figured, and which were selected from some of the most 



celebrated 



