CHAPTER VII.

PARASITES FREE WHILE YOUNG.

Isopod Parasites--Chigoe--Ticks--Pigeon-mite--Bopyridæ-- Ichthoxenus--Peltogasters--Tracheliastes--Penellæ-- Lerneans--Guinea-worm--Leptodera of Snail--Nematodes in Bones--Lichnophoræ--Gregarinæ 138