X CONTENTS 



CHAPTER XXL— THE FOOD OF ANIMALS— OMNIVOROUS BIRDS 

 AND PRIMITIVE VERTEBRATES 



Page 



Birds (Aves): Crows, Starlings; Geese, Ducks, and Swans; Game-Birds — Quail, 

 Partridge, Pheasant, Peacock, Red Jungle-Fowl, Guinea-Fowl, Turkey, Caper- 

 cailzie, Grouse; Rails — Land-Rail or Corncrake, Moor-Hen, and Coot; 

 Cranes, Trumpeters, and Bustards. Running Birds — African Ostrich, American 

 Ostriches, Emeu 235 



Primitive Vertebrates (Protochordata) — Sand and Mud Swallowing, Ciliary 

 Currents. Lancelets. Sea-Squirts or Ascidians. Worm-like Protochordates — 

 Acorn-headed Worm 243 



CHAPTER XXII.— THE FOOD OF ANIMALS— OMNIVOROUS 

 MOLLUSCS, INSECTS, AND CRUSTACEANS 



Molluscs (Mollusca) : Snails and Slugs (Gastropoda) — Grey Field-Slug, Black 

 Slug. Tusk-Shells (Scaphopoda). Bivalve Molluscs (Lamellibranchia) — Fresh- 

 water Mussels, Cyclas, Sand-Gapers- 247 



Insects (Insecta) : Straight-winged Insects (Orthoptera) — Cockroaches, Earwigs. 

 Membrane-winged Insects (Hymenoptera) — Social Wasps, Bees, and Ants. 

 Two-winged Flies (Diptera) — House-Fly. Scale-winged Insects (Lepidoptera) — 

 Omnivorous Caterpillars 250 



Crustaceans (Crustacea) : Higher Crustacea (Malacostraca) — Crayfish, West 

 Indian Fresh -water Prawn; Lower Crustacea (Entomostraca) — Barnacles, 

 Copepods, Mussel-Shrimps, Leaf-footed Crustacea 253 



