5614 Mollushs. 



Turtonia minuta. Not uncommon, among the small sea-weeds, be- 

 tween tide-marks at Mousehole, near Penzance, and the Land's End. 



Pisidium obtusale. Ponds, Chyan Hall Moor, near Penzance. 

 „ pusillum. Near Penzance. 



Crenella costulata. Long Rocks and St. Michael's Mount, Pen- 

 zance, and Mousehole. 



Nucula nucleus. Mount's Bay, Penzance, by dredge. 



Pectunculus Glycimeris. At times on the Hayle Sands, Millett. 



Chiton cinereus. Penzance. 



Patella pellucida. Attached to Chondrus mamillosus, near low- 

 water mark, Mousehole, near Penzance, and to stalks of Laminaria 

 digitata, St. Michael's Mount. 



Acmgea virginea. Near low-water mark, Battery Rocks and Long 

 Rocks, Penzance. 



Dentalium tarentinum. Sandy ground, three or four miles from 

 shore, Mount's Bay. 



Fissurella reticulata. Whitesand Bay, near the Land's End, and 

 Port Curno Cove. 



Trochus zizyphinus. Penzance and Mousehole. 



Phasianella pullus. Fine and not uncommon, feeding on Chondrus 

 mamillosus, obtainable at low-water spring tides at Mousehole. 



lanthina communis. Has been found at Whitesand Bay, near the 

 Land's End, Hayle Sands, St. Ives Bay and Bude Haven. 



Rissoa punctura. Tolerably plentiful among shell sand, Whitesand 

 Bay, near the Land's End. 



„ striata. Abundant in sea-weeds at Penzance and the Land's 

 End. 



„ parva. Most abundant in the small sea- weeds, Mousehole 

 and other places at Penzance, also at the Land's End. 



„ semistriata. In June, 1853, I found a few beneath stones, 

 St. Clement's Isle, near Penzance, but they were not abundant. 



„ rubra. Mousehole, near Penzance, and the Land's End 

 in sea-weed. 



„ fulgida. Sea-weeds, Mousehole, near Penzance. 



JefFreysia diaphana. Sea-weeds, Mousehole, near Penzance. 



Skenea planorbis. Abundant in the small sea-weeds, Mousehole, 

 near Penzance, and the Land's End. 



„ rota. Mousehole, near Penzance. 



Cerithium reticulatum. Penzance and the Land's End. 



„ adversum. St. Clement's Isle, near Penzance ; sea-weeds, 



Penzance and the Land's End. 



