ZOOLOGY 



MOLLUSCS 



Less appears known concerning the molluscan fauna of Buckingham- 

 shire than of almost any other southern county. 



Only one list seems ever to have been published (W. D. Roebuck : 

 Science Gossip, 1883, p. 173), and through this and information supplied 

 by Mr. A. Leicester we are made acquainted with the occurrence of 

 65 species out of the 139 known to inhabit the British Islands. The 

 soil and physical features of the county however are such that many more 

 forms of mollusca must abound there, and need only to be sought for. 

 Under these circumstances the names of 30 other species, marked with 

 an *, have been added, since they are common and widely distributed 

 forms, and are present in adjacent counties. 



Of those that have been met with the most interesting are the 

 Roman snail (Helix pomatia] and the pretty little Acanthinula lamellata. 

 The former is a very local species in England, having its headquarters on 

 the chalk downs of Surrey, where it existed before the Romans came 

 over. The other, which is an essentially northern form, had not until 

 quite lately been found living further south than mid-Staffordshire, 

 though in pleistocene times its range extended to the shores of the 

 North Sea and the Channel. 



In the exploration of a pile-dwelling of Romano-British date at 

 Hedow, in 1895, the following species were found : Helix aspersa, 

 H. nemoralis, Succinea putris, Limncea palustris (?), Planar bis corneas, P. 

 marginatus and Cyclas sp. ? (Records of Bucks, vii. 547). 



A. GASTROPODA 



I. PULMONATA 

 a. STYLOMMATOPHORA 



Limax maximum, Linn. 



flavus, Linn. 



arborum, Bouch. -Chant.* 

 Agriolimax agrestis (Linn.) 



larou (Mfill.)* 

 Amalia strwerbii (Fr.)* 



- gagates (Drap.)* 

 yitrina pellucida (Mttll.) 

 Vitrea crystallina (Mttll.)* 



alllaria (Miller)* 



- glabra (Brit. Auct.)* 



cellarla (Mull.) Two shells were found 



within a stone coffin under the floor of 

 Turville Church (Records of Bucks, viii. 

 288) 



Vitrea nitidula (Drap.) 



pura (Aid.)* 



radiatula (Aid.)* 



mtida (Mull.)* 



fulva (Mttll.) 

 Arion ater (Linn.) 



hortensis, Fdr. 



circumscriptus, John. 



subfuscus (Drap.)* 

 Function pym&um (Drap.) 

 Pyramidula rotundata (Mttll.) 

 He/ice/la virgata (Da C.)* 



itala (Linn.)* 



caperata (Mont.) 



cantiana (Mont.)* 



Hygromta fusca (Mont.) Fawley Woods 



granulata (Aid.)* 

 - hispida (Linn.) 



69 



