INDEX, 



291 



on Helix villosa and H. cartti- 

 siana, 254. 

 Wright, B. M., dormant snails re- 

 vived by, 103. 



Y. 



Yorkshire, isolated ponds on the 

 wolds of, 10. 

 foreign snails living in a garden 

 in, 192, 263. 



Helix lactea found in, 252, 

 Young molluscs. See Fry. 



Zanxichellia, shells adhering to, 53. 

 Zebra mussel. See Dreissena 



polymorpha. 

 Zonites in Palaeozoic coal measures 



of Nova Scotia, 115. 



