CONTENTS OF VOLUME II. xi 



Chapter XXIII. Excretory organs. Pp 561 — 609. 



Platyelminthes, pp. 561—562. MoUusca, pp. 562—563. Polyzoa, p. 563. 

 Branchiopoda, p. 563. Chsetopoda, pp. 563 — 566. Gephyrea, pp. 566 — 567. 

 Discophora, p. 567. Arthropoda, pp. 567 — 568. Nematoda, p. 568. Excretory 



organs and generative ducts of the Craniata, pp. 568—607. General, pp. 



568 — 569. Elasmobranchii, pp. 569 — 576. Cyclostomata, pp. 577—578. Teleostei, 

 pp. 578—580. Ganoidei, pp. 580 — 582. Dipnoi, p. 582. Amphibia, pp. 582 — 588. 



Amniota, pp. 588—599. General conclusions and summary, pp- 600—607. 

 Pronephros, pp. 600 — 601. Mesonephros, pp. 601 — 603. Genital ducts, pp. 603 — 

 606. Metanephros, pp. 606 — 607. Comparison of the excretory organs of the Chor- 

 data and Invertebrata, pp. 607 — 608. Bibliography of Excretory organs, pp. 608 — 

 609. 



Chapter XXIV. Generative organs and genital ducts. Pp. 610 — 619. 



Generative organs, pp. 610 — 615. Porifera, p. 610, Coelenterata, pp. 610 

 — 611. Chffitopoda and Gephyrea, p. 612. Chsetognatha, pp. 612 — 613. Polyzoa, 

 p. 613. Nematoda, p. 613. Insecta, p. 613. Crustacea, pp. 613 — 614. Chordata, 

 pp. 614 — 615. Bibliography of generative organs, pp. 615 — 616. Genital ducts, 

 pp. 616—619. 



Chapter XXY. The alimentary canal and its appendages, in the 

 Chordata. Pp. 620—643. 



Mesenteron, pp. 620—636. Subnotochordal rod, pp. 620 — 622. Splanchnic, 

 mesoblast and mesentery, pp. 622 — 623. Respiratory division of the Mesenteron, 

 pp. 623—630. Thyroid body, pp. 624—627. Thymus gland, p. 627. Swimming 

 bladder and lungs, pp. 627 — 630. The middle division of the Mesenteron, pp. 630 — 

 634. Cloaca, pp. 630—631. Intestine, pp. 631—632. Liver, pp. 632—633. Pan- 

 creas, pp. 633 — 634. Postanal section of the Mesenteron, pp. 634 — 636. 



The stomoddBum, pp- 636 — 642. Comparative development of oral cavity, 

 pp. 638—640. Teeth, pp. 640—642. 



The proctodaeum, pp- 642—643. Bibliography of alimentary canal, p. 643. 



