CONTENTS OF VOLUME I. XI 



CHAPTER XVIII. CRUSTACEA. 



H^tory of larval forms, pp. 459 511. Brant hiopoiia, pp. 459 465. Mala- 

 costrata, pp. 465 487. CofefoJa, pp. 487 493. Cirriptdia, pp. 494 500. 

 OttracodtL, pp. 500 501. Phytogeny of the Cnuttuea, pp. 501 511. The forma- 

 tion of the germinal layers, pp. 511 511. Comparative development of organs, 

 pp. 5115*9- 



CHAPTER XIX. 



Pcecilopoda, pp. 534538. Pycnogonida, pp. 538, 539. Pentastomida, 

 pp. 539 541. Tardigrada, p. 541. Summary of Arthropodan Development, 

 PP- 54' 543- 



CHAPTER XX. ECHINODERMATA. 



Development of the germinal layers, pp. 544 553. Development of the 

 larval appendages and metamorphosis, pp. 553573. Summary and general 

 considerations, pp. 573 576. 



CHAPTER XXI. ENTEROPNEUSTA. Pp. 579 583. 

 INDEX. Pp. 584 590. 

 APPENDIX. 



