CONTENTS. ix 



PAGE 



c. Histolysis of the Trachea? of the Larva, and De- 

 velopment of the Trachea of the Pronymph 306 



f, Histolysis of the Fat Bodies and other Larval 



Tissues 307 



g. Histolysis and other Changes in the Alimentary 



Canal 311 



//. The Position of the Neuroblast and the Develop- 

 ment of the Stomodaeum of the Pronymph - 313 

 SEC. 2. The Development of the Nymph - 315 



a. The Position of the Imaginal Discs in the Pro- 

 nymph - 315 



(>. Development of the Integument of the Head and 



Thorax - 318 



c. Changes in the Neuroblast and Development of the 



Peripheral Nerves - 324 



e. The Pupa-sheath - 330 



f. Changes in the Alimentary Canal 331 



g. Origin of the Mesoderm 333 

 //. Development of the Dorsal and Sterno-dorsal 



Muscles - 336 



7. The Tracheal System of the Nymph 338 



/'. The Dorsal Vessel and Ccelom 340 



SEC. 3. The Development of the Imago from the Nymph S44 



APPENDIX TO CHAPTERS VI. TO IX. Methods of Study 



BlBLIOGRAPHIES. 1 to 3, p. I ; 4 to 10, p. 7 ; 11 to 15, p. 25 ; 16 to 27, 

 PP- 3-, 33 ; 28 to 30, p. 62 ; 31 to 35, p. 72 ; 36 to 41, pp. 99, 100 ; 42 to 

 48, p. 1 06 ; 49 and 50, p. 119 ; 51 to 71, pp. 127, 128 ; 72 to 81, pp. 154, 

 155 ; 82 to 89, p. 190 ; 90 to 95, p. 198 ; 96 to 115, pp. 230, 231 ; 116 to 

 121, p. 235 ; 122 to 136, pp. 262, 263 ; 137 to 139, p. 276 ; and 140 to 147, 

 p. 292. 



ERRATA. 



Page 17. line 8. for ' hypoblast behind,' read ' hypoblast behind the 



blastopore.' 



Page 33, last line, for ' xvi.' read ' xiv.' 

 Page 65, in footnote, for ' K. L. C.' read ' C. L. C.' 

 Page 77, in footnote, for ' Chironomus ' read ' Corethra.' 



