CONTENTS OF VOL. II. 



PNEUMOBRANCHIATA 



FAMILY III. PUPAD.E. 



CYLINDRELLA, 

 PUPA, . 

 VERTIGO, 



FAMILY IV. HELICINAD^. 



CYCLOSTOMA, . 

 HELICINA, . 



304 



304 

 312 

 332 



345 



345 



350 



