MOLLUSCS 



these mussels are sometimes fine, and British pearls in ancient days en- 

 joyed some celebrity ; they even had their attractions for Julius Caesar. 



Papers on the Cornish non-marine molluscan fauna as a whole are 

 not abundant, and deal more with the western than the eastern portion of 

 the duchy. The more important are a series by Mr. T. Cocks in the 

 Annual Reports of the Royal Cornwall Polytechnic Society (No. 17, 1849, 

 p. 6 1 ; No. 24, 1856, p. 20 ; and No. 45, 1877, p. 124), and one by 

 Mr. E. D. Marquand in the Transactions of the Penzance Natural History 

 and Antiquarian Society (new ser. 18834, i. 403). From these, the 

 Records of the Conchological Society and various scattered sources, the 

 accompanying list has been compiled. 



A, GASTROPODA 



I. PULMONATA 



a. STYLOMMATOPHORA 



Testacella maugei, Fer. Penzance ; Hayle ; 

 Truro ; Falmouth 



kaliotidea, Drap. Newlyn ; Heamoor ; 



Penzance 

 Limax maximus. Linn. 



flavus. Linn. 



arborum, Bouch.-Chant. 

 Agriolimax agrestis (Linn.) 



Lev'ts (Mall.) 

 Amalia sowerbii (Fir.) 



gagates (Drap.) 



Vitrina pellucida (Mall.) Local ; it also occurs 



in the Scilly Isles 

 Vitrea crystalline! (Mall.) 



luc'ida (Drap.) 



alliaria (Miller) Also occurs in the 



Scilly Isles 



glabra (Brit. Auct.) 



cellaria (Mall.) Also occurs in the Scilly 



Isles 



nitidula (Drap.) 



pura (Aid.) 



excavata (Bean) Land's End 



nitida (Mall.) Trevaylor 



fulva (Mull.) Towans ; Falmouth 

 Arlon ater (Linn.) Plentiful and large ; the 



variety bicolor is common 



horttnsis, Fir. 



circumscriptus, John. 



subfuscus (Drap.) 

 Pyramidula rupestris (Drap.) 



rotundata (Mall.) 

 Helicella virgata (Da C.) 



itala (Linn.) 



caperata (Mont.) 



barbara (Linn.) 

 Hygromia fusca (Mont.) Local 



granulata (Aid.) Also occurs in the 



Scilly Isles 



Also occur in the 

 Scilly Isles 



Hygromia hispida (Linn.) 



rewlata (Fr.) Whitsand Bay ; St. 



Michael's Mount ; Lizard ; Falmouth ; 

 Newquay ; and in the Scilly Isles 



rufescens (Penn.) Also occurs in the Scilly 



Isles 



Acanthinula aculeata (Mall.) Penzance ; Fal- 

 mouth ; Truro 



Vallonia pulchella (Mall.) Also occurs in the 

 Scilly Isles 



Helicigona arbustorum (Linn.) Morvah 



Helix aspersa, Mall. \ Also occur in the 



nemoralis, Linn. J Scilly Isles 



bortensis, Mall. Newquay 



pisana, Mull. Whitsand Bay ; St. Ives ; 



Falmouth 



Buliminus obscurus (Mull.) Falmouth 

 Cochlicopa lubrica (Mall.) Also occurs in the 



Scilly Isles 



Azeca tridens (Pult.) Truro 

 Pupa cylindracea (Da C.) Also occurs in the 



Scilly Isles 



muscorum (Linn.) 



Sphyradium edentulum (Drap.) Local 



Vertigo pygmcea (Drap.) Local 



Balea perversa (Linn.) Also occurs in the 



Scilly Isles 



Clausilia bidentata (Strom.) 

 Succinea putris (Linn.) Also occurs in the 



Scilly Isles 



elegans, Risso. 



b. BASOMMATOPHORA 



Carychium minimum, Mull. 



Melampus denticulatus (Mont.) Penzance ; 

 Falmouth 



Alexia myosotis (Drap.) Land's End ; Pen- 

 zance ; Whitsand Bay ; Truro ; Scilly 

 Isles 



Lenconia bidentata (Mont.) Land's End ; 

 Mousehole ; Hale ; Scilly Isles 



Ancylus fluviatilis, Mall. 

 161 21 



