Xll CONTENTS. 



PAGB 



or Larvae Entrance of Free-living Larvae (Active Migration) Passive 

 Migration (with Food) Viability of the Germs, . . . .57-66 



Development of the Germs after Migration Direct development Wandering 

 within the Body of the Host Development of the Larval or intermediate 

 stage ("Helminths of the Second Developmental Stage") Sexually 

 mature Larvae, . . . . ... 66-70 



Change of Host Development and Migration of the Distomes Wandering of 

 Strongylua Of Bladder- Worms Action of the Digestive Juices Migration 

 of Penta&tomum Parasites with Free Sexual Forms Intermediate and 

 Definitive Hosts Law of numerous Embryos, and its significance in 

 regard to Parasitism Theory of erratic Embryos and of Degeneration 

 Conditions of development Duration of Life Death, . . . 71-88 



CHAPTER V. 

 THE ORIGIN OF PARASITES, 



AND THE GRADUAL DEVELOPMENT OF PARASITIC LIFE. 



Various kinds of Parasitism Relations to Free-living Animals Free-living 

 Nomatodes Rkabdoncma nigrovenosum Parasitic Nematodes with 

 Rhabditiform Larvae Loss of the Rhabditic Stage Cestodes and 

 Trematodes Relations to the Hirudinea and Turbellaria Acanthocephali 

 and Nematodes Origin of the intermediate Host Of the intermediate 

 stage, . . .' ... : . . . 89-119 



CHAPTER VI. 

 THE EFFECTS OF PARASITES ON THEIR HOSTS, 



PARASITIC DISEASES. 



History of the Subject Nature of Parasitic Diseases Loss of Nutritive 

 Material Consequences of growth and of increase in numbers Influence of 

 Wandering and Migration Diagnosis of Helminthiasis Therapeutics and 

 Prophylaxis Etiology Statistics of Human Parasites Sources of Human 

 Parasites Their occurrence and distribution, .... 120-170 



SECTION II. 



SYSTEMATIC ACCOUNT OF THE PARASITES 

 INFESTING MAN. 



INTRODUCTION. 



Number of Human Parasites Larval and Adult Parasites Entozoa and Epi- 



zoa Zoological position, ..... 173-174 



