MARINE SHELLS. 79 



Troehus granulatUS, Bom. Channel Isles (Br. Con.) 



T. zizyphinus, L. Guernsey (Br. Con.) Alderney, common (Marquand). 



Var. humilior, Jeff. Herm (Marshall) . Alderney (Marquand). Guernsey 

 and Herm, common (Tomlin). Var. Lyonsii, Leach. Alderney, alive at 

 Braye Bay, dead^on shell beach (Marquand) . 



Phasianella pulla, L. Guernsey and Herm, common on shore and dredged, 

 small (Tomlin). Alderney, very common (Marquand). Var. oblong a, 

 Jeff. Guernsey (Marshall). Var. pulchella, Reel. Guernsey and Herm, 

 the prevailing form (Marshall) . 



Lacuna erassior, Mont. Channel Isles (Br. Con.) Alderney, frequent at 

 the shell beach, usually much worn ; rare elsewhere (Marquand). Occa- 

 sional in dredgings (Tomlin) . 



L. divarieata, Fabr. Dredgings off Guernsey, not common, and small 

 (Tomlin). Alderney shellsand, a few worn specimens (Marquand). Var. 

 gracilior, Mete. Guernsey (Metcalfe). 



L. puteolus, Turt. Channel Isles (Br. Con.) Alderney, alive at low water 

 mark ; dead shells common in shellsand (Marquand) . Rare in dredgings 

 (Tomlin). Var. conica, Jeff. Guernsey (Marshall). Var. laetea, Jeff. 

 Guernsey (Barlee). Alderney (Marquand). Var. clausa, Jeff. Sark 

 (Barlee). Var. expansa, Jeff . Guernsey (Marshall). Alderney (Marquand). 



L. pallidula, Da G. Guernsey (Marshall). On weeds, not common and 

 small (Tomlin). Var. neritoidea, Gould. Guernsey (Marshall). Var. 

 patula, Thorpe. Guernsey (Jeffreys). Platte Saline, Alderney, alive 

 (Marquand). Herm (Marshall). Var. naticiformis, Marsh. Guernsey, at 

 low water, on some off -lying rocks (Marshall). 



LittOPina ObtUSata, L. Very common in all the islands. Var. ornata, Jeff. 

 Guernsey, plentiful (Marshall). Y&r.fabalis, Turt. Guernsey (Marshall). 



L. neritoides, L. Guernsey and Herm, common (Tomlin). Alderney, com- 

 mon on rocks at high water mark (Marquand) . 



L. rudis, Maton. Very common in all the islands. Var. saxatilis, Johnst. 

 Alderney (Marquand). Var. sulcata, Leach. Channel Isles (Barlee). 

 Alderney (Marquand). Var. jugosa, Mont. Alderney, common in shell- 

 sand, alive at Longy Bay (Marquand). Var. patula, Thorpe. Guernsey 

 (Marshall). Var. globosa, Jeff. Guernsey (Marshall). Var. similis, Jeff. 

 Guernsey (Marshall). Var. eompressa, Jeff. Herm (Marshall). Var. 

 Icevis, Jeff. Guernsey (Marshall). 



L. littorea, L. Very rare in the Channel Islands ; I know of only three 

 instances of its occurrence at Guernsey, and two at Jersey in many years 

 (Marshall, Journ. Conch., 1898). Guernsey, very rare ; I have twice 

 taken it near Bordeaux Harbour (Tomlin) . More common in Alderney, 

 where it is of frequent occurrence in pools between tide -marks (Marquand) . 



RiSSOa Striatula, Mont. Guernsey and Herm, locally common, gregarious 

 (Tomlin). Alderney, rare in shellsand (Marquand). Var. ecarinata, 

 Mtros. Guernsey (Marshall). Rather commoner than type (Tomlin). 



R. lactea, Mich. Guernsey and Herm, very rare ; gregarious on the under 

 side of big stones deeply buried in muddy sand (Tomlin) . Guernsey and 

 Herm, rare (Marshall). 



R. eaneellata, Da C. Guernsey and Herm, local, but abundant where it 

 occurs (Marshall). Rare alive, very common dead (Tomlin). Alderney, 

 dead shells common (Marquand). Var. paupercula, Jeff. A single dead 

 and worn specimen at Herm (Jeffreys) . 



R. calathus, F. § H. Guernsey and Herm, rather common (Br. Con.) 

 Abundant in the shellsand of Herm (Marshall) . Common dead on shore 

 and dredged ; very rare alive in dredgings (Tomlin) . Alderney, frequent 

 in shellsand (Marquand). 



R. eimieoides, Forb. Coralline zone, Guernsey (Jeffreys). 



