

MARVELS 



P N D - L I F E ; 



YEAE'S MICKOSCOPIC EECEEATiOKS 



AMONG THE 



POLYPS, INFUSORIA, ROTIFERS, WATER-BEARS, AND 

 POLYZOA. 



BY HENEY J. SLACK, F.G.S., 



AUTHOR OF "the I'llILOSUPHY OF rKOGKESS IN HUMAN AFFAIRS," ETC., ETC. 



LONDO]^: 

 GROOMBRIDGE AND SONS. 



M L»t«JC LXl. 



