CHAPTER IX.

PARASITES THAT MIGRATE AND UNDERGO METAMORPHOSES.

Nostosites--Xenosites--Hosts serving as a Crèche, a Vehicle, or a Lying-in Hospital--Lamarck on Spontaneous Generation--Trematodes--Monostomes--Sporocysts and Cercariæ--Passage from one Host to another--Distomes-- Flukes--Hemistomes--Amphistomes--Tæniæ of the Dog and Wolf--Hydatids--Tænia solium in Man--Cysticercus of Pig--Cysticercus of Rabbit and Hare passing into Dog-- Coenurus of Sheep--Bothriocephalus--Linguatula in Negro-- Strongyli--Trichinæ--Panic in Germany--Vibriones in Corn-- Echinorrhynchus--Dicyema 183