VJ11 CONTENTS. 



XXII. THE ANATOMY AND METAMORPHOSIS OF CYCLOPS . 223 



XXIII. THE HARD PAJRTS OF A GRASSHOPPER . . . 237 



XXIV. THE INTERNAL ANATOMY OF A GRASSHOPPER . . 258 

 XXV. THE GENERAL ANATOMY OF ANODONTA . . . 269 



XXVI. EXAMINATION OF TRANSVERSE SECTIONS OF UNIO OR 



ANODONTA 285 



XXVII. THE LAMELLIBRANCHIATE GILL 296 



XXVIII. THE DEVELOPMENT OF LAMELLIBRANCHS . . .311 



XXIX. THE GENERAL ANATOMY OF THE SQUID . . . 332 



XXX. THE DEVELOPMENT OF THE SQUID .... 364 



