INDEX, 
Technical terms are wm italics, and will be found explained 
at pages to which references are gwen. 
A. 
ACHATINA ACICULA, 171; pulsations of the heart of, 172 ; 
subterranean habits of, 7b. 
Acme fusca, 223 ; how to secure, 2b. 
Adductor muscles of bivalves, 18. 
Agate snails, 171. 
Airbreathing snails, 65; relation of, to water-breathing 
snails, 4b. ; orders of, 2b. 
Alasmodonta margaritifera, 27. 
Amber snails, 174. 
Amphipeplea genus, 186. 
— glutinosa, 196. 
involuta, 198. 
Amphistoma subclavatum, parasite of Cyclas, 35. 
Anal opening in bivalves, 14. 
Ancylus genus (fresh-water limpets), 205. 
fluviatilis, 206 ; respiration in, 207; parasite of, 208. 
— lacustris, 208. 
—- oblongus, 208. 
Animal kingdom, primary divisions of, 1. 
Annulose animals, 2 
Anodon anatinus, 31. 
cygneus, 30; varieties of, 31 ; mite of, 32. 
