vi CONTENTS. 



PAGE 



< . Tlie. Development of the Ovaries and Ova in the 



I'u pa and Young Imago - 698 



f. The Development of the Utero-Vaginal Tube and 



its Appendages, and of the Oviduct and Parovnria 703 



,i, r . On the Nature of Ova and the Relations of the Germ 



to the Vitellus - 707 



//. On the Changes which occur in the Germinal 



Vesicle and Free Nuclear Formation 711 



/. On the Development of the Germ-Ova in the Epi- 

 thelial Cells of the Parovarium - 718 



k. Some General Remarks on the Similarity of the 



Generative Functions in Insects and Trematodes - 721 

 SEC. 5. The External Generative Organs- - 724 



a. General Considerations and Nomenclature of the 



Abdominal Segments - 724 



b. Development of the External Organs in Insects 



Generally - 730 



c. Comparative .Morphology of the External Generative 



Organs - 732 



d. The External Generative Organs of the Male Blow- 



Fly - 73^ 



e. The External Generative Organs of the Female 



Blow-Fly - - 745 



BIBLIOGRAPHIES. 148 to 155, p. 351 ; 156 to 160, p. 352; 161 to 169, 

 p. j8g ; 170 to 179, p. 433; 180 to 186, p. 434; 187 to 191, p. 479; 

 192 to 195, p. 4</, ; 196 to 200, p. 500 ; 201 to 217, p. 501 ; 218 to 231, 

 p. 5j ; 232 to 247, p. 503 ; 248 to 252, p. 504; 253 to 258, p. 539; 

 259 to 263, p. 582 ; 264 to 277, p. 583 ; 278 to 287, p. 596 ; 288 to 300, 

 1 1. C-03 ; 301 to 305, p. 631 ; 306 to 313, p. 635 ; 314 to 315, p. 656 ; 316 

 to 325, p. r, 5 ,S ; 326 to 334. p. 659 ; 335 to 338, p. 678 ; 339 to 348, p. < 

 349 to 354, p. 685 ; 355 to 358, p. 693 ; 359 to 368, p. 712 ; 369, p. 7^3 ; 

 370 to 376, p. 725. 



