xii CONTENTS. 



PAGE 



Brachiopoda, MoHusca, Heraicliordata, and Urochordata — General 

 Ee marks concerning Digestion in the Invertebrata . . 20 



CHAPTER IV. 



Digesllon continued : Digestion in particular — Digestion in the 

 Protozoa: No specialisation of parts — Digestion in the Porifera 

 and Ccelenterata : Researches of Greenwood, Lankester, Haeckel, 

 Voigt, Cienkowski, MacMunn, Fredericq — Digestion in the 

 Echinodermata : Researches of Fredericq, Griffiths, MacMunn — 

 Digestion in the Triclioscolices : Experiments of Fredericq — 

 Digestion in the A nnellda : 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; Lowne on the 

 Malpighian Tubules of CaUiphora ; 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 

 LamelUbranchiata : Researches of Fredericq, Griffiths, and 

 MacMunn — Digestion in the Gasteropoda : Investigations of 

 GrifKths, Levy, and Fredericq — Digestion in the Cephalopoda : 

 Researches of Griffiths, Krukenberg, Fredericq, and De Bellesme 

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

 Constituents of the Secretions of the Salivary Glands and Pancreas 

 (so-called "liver") in the /nwerfeivrtto, &c. . . -79 



CHAPTER V. 



Absorption in the Invertehrata : 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, Calenterata, Echinodermata, Cestoidea, Annelida, 

 Myriapoda, Insecta, Arachnida, Crustacea, Polyzoa, Brachiopoda, 

 and 3Iollusca — General Remarks on Absorption, &c . .11 



