THE GENERA 



OF 



EECENT MOLLUSCA; 



nj 



□ 

 m 

 a 



□ 



ARRANGED 



ACCORDING TO THEIR ORGANIZATION. 



^^^ m 



O -D BY 



m^= ° HENRY ADAMS, F.L.S. 



AND 



AETHUE ADAMS, M.E.C.S., F.L.S. 



IN THREE VOLUMES.— VOL. l. 



LONDON : 

 JOHN VAN VOORST, PATERNOSTER ROW. 



MDCCCLVIII. 



