xii CONTENTS. 



7AGE 



BracUiygoda, MoUusca, Hernichordata, and Urochordata—Beaera. 

 Remarks concerniiig Digestion in the Invertebrata 



CHAPTER IV. 



Digestion continued : Digestion in pakticulae— Digestion in the 

 Protozoa: No specialisation of parts — Digestion in the Porifera 

 and Ccdenterata : Eesearohes of Greenwood, Lankester, Haeckel, 

 Voigt, Cienkowski, MacMunn, ITredericq — Digestion in the 

 Echinodermata : Researches of Fredericq, Griffiths, MacMunn — 

 Digestion in the Trichoscolices : Experiments of Fredericq — 

 Digestion in the Annelida : Researches of Fredericq and Griffiths ; 

 the Pancreatic Function of the so-called "Liver" — Digestion in 

 the Insecta and Arachnida : Researches of Griffiths on the 

 Salivary Glands and "Livers" of the Insecta; Lowue on the 

 Malpighiau Tubules of OaUiphora; Von Planta, Leuckart, and 

 Schonfeld on the Food Stuff of Bees ; the Researches of Griffiths 

 and Johnstone on the Salivary Glands and " Liver " of the Spider 

 — Digestion in the Crustacea; Investigations of Griffiths on the 

 " Livers" of the Brachyura and Macroura ; Stamati's Investiga- 

 gations on the Gastric Juice of the Crayfish — Digestion in the 

 LameUihranchiata : Researches of Fredericq, Griffiths, and 

 MacMunn — Digestion in the Gasteropoda : Investigations of 

 Griffiths, Levy, and Fredericq — Digestion in the Cephalojpoda : 

 Researches of Griffiths, Krukenberg, Fredericq, and De Bellesme 

 on the " Liver " (Pancreas) of Sepia — Digestion in the Tunicata — 

 Constituents of the Secretions of the Salivary Glands and Pancreas 

 (so-called "liver") in the J'm?;erte5?-ato, &c. . . -79 



CHAPTER V. 



Absorption in the Invertebrata : No Distinct Set of Vessels — The 

 Function of the Typhlosole — Absorption by the Alimentary Canal 

 and Blood-vessels — Absorption in the Protozoa : Protozoan Absorp- 

 tion due to Excitability or Irritability of the Cell— Absorption in 

 the Porifera, Ccdenterata, Ecliinodermata, Cestoidea, Annelida, 

 Myriapoda, Insecta, Arachnida, Cruftacea, Polyzoa, Brachiopoda, 

 and MoUusca — General Remarks on Absorption, &c . . u 



