BIBLIOGRAPHY. 



185 



in the British museum as from Van Diemen's Land, have not 

 been found and remain unique. 



The whole work is well and carefully done, the variations 

 of each species as far as known are described, copious lists of 

 locahties are given, the critical remarks under each species are 

 judicious and well considered, and the author may be congratu- 

 lated upon the thorough manner in which the subject has been 

 treated.— J.W.T. 



»«««^ 



LIST OF LAND AND FRESHWATER MOLLUSCA 

 COLLECTED AT PETERBOROUGH. 



By a. W. NICHOLLS. 



[Read before the Conchological Society.] 

 Name. 



Achatina acicula 

 Ancylus flu viatilis 

 Ancylus lacustris 

 Anodonta cygnea 

 Anodonta anatina 



Do. var. radiata 



Do. var. ventricosa 

 Arion ater 

 Arioii horteiisis 

 Assiminea Grayana 



Balea perversa 



Bidimus obscurus 

 Bythinia tentaadata 

 Do. var. albida 

 Bythinia Leachii 

 Carychiitm ^niniinum 



Claiisilia rugosa 



Clausilia Ia7iii7iata 

 Cochlicopa lubrica 



