iv CONTENT S„ 



SECTION IV. 



Of the Syftems or Methods pf Shells, p. 73 



SECTION V. 



The Characters and Parts of Shells defined, 

 and other obfervations, - - p. loi 



SECTION VI. 



The Author's Syll(;.|Ti, - - - P« ^24 



SECTION VII. 



Ccntinuatio^i of the Ai:3thor's Sydem, and 

 the Cbflification of the Simple Uni- 

 valves, p ^ P.- 13s 



SECTION VIIL 



ChuTiacatipn of t!ie Chambered Uinyalves, 



p. 154 



SECT10>J 



