JOURNAL OF CONCHOLOGY. 153 



The Pantopoda contained in present list number thirty-five, 

 additions to which are earnestly desired. 



The total number of Crustacea from this region, described 

 to present time, is 3209, of this vast number Dr. Norman 

 possesses 1362. These valuable hsts are issued mainly to make 

 known the contents of Dr. Norman's museum to curators of 

 museums and private naturalists, in the hope that by exchange 

 or purchase, it may be still further enriched. 



LAND AND FRESHWATER MOLLUSCA 

 ROUND CHRISTCHURCH, SOUTH HANTS. 



By CHARLES ASHFORD. 



Little description of this district is needed. A five-mile 

 radius extends to the border of Dorset on the west, and nearly 

 to the fringe of the New Forest on the north-east. The circle 

 includes the southern part of the basins of two rivers — the 

 Avon and the Stour — which unite just before entering Christ- 

 church harbour. Probably the bed of an ancient estuary, the 

 surface is for the most part fiat and very thinly wooded, but 

 the land rises about one hundred feet towards Bournemouth 

 on one side and the Forest on the other. Geologically, an 

 unbroken bed of coarse gravel and sand from three to thirty 

 feet thick overlies the equally continuous Lower Tertiary Clays. 

 Rock, in its popular sense, is altogether absent inland. 



With a few exceptions, land-species are poor in individuals. 

 It will be observed that the aquatic genera Unio, Paludina, 

 and Dreissena are unrepresented in the list. 



The names of a few localities situate beyond the five-mile 

 limit have been placed within square brackets. 



I have to thank the revising committee of the Conchologi- 

 cal Society for a most careful scrutiny of the shells submitted 

 to their judgment. 



