Mollusks. 5613 



the rivers Isis, Thames and Cherwell, in suitable localities, apparently 

 throughout their whole length ; in the place of Unio tumidus we find 

 Unio pictorum inserted, which I have never seen in Oxfordshire. 

 *2ndly. Specimens of Unio tumidus were, until quite recently, in the 

 Ashmolean Museum labelled pictorum. 3rdly. I have repeatedly 

 known these two species mistaken the one for the other. 



As Pisidium is a critical and extremely difficult genus, I think the 

 following extract from a letter of Mr. Whiteaves of value ; it was in 

 answer to a request that he would kindly send me specimens of those 

 species I had not myself taken in Oxfordshire : — " The Pisidia are in 

 the possession of my friend Mr. Dalton, with whom I collected them, 

 and were named by Mr. Jeffreys, to whom he sent them. Obtusale 

 is, however, on Mr. Pickering's authority."" 



These additions to the Oxfordshire Mollusca make this the fullest 

 local catalogue published. 



Alfred Merle Norman. 



Kibworth, Leicestershire. 



Observations on the Mollusca to be found on the Coasts of Cornwall. 

 By William F. Templer, Esq. 



Psammobia tellinella. Single valves. Port Curno Cove, near 

 Penzance. 



„ costulata. Single valves. Port Curno Cove. 



Tellina pygmaea. Whitesand Bay and Port Curno Cove. 

 „ incarnata. Pentewan Bay, by dredge, Fowler. 



Syndosmya alba. Mount's Bay, Penzance, by dredge. 



Ervilia castanea. Single valves. Whitesand Bay and Port Curno 

 Cove. 



Mactra helvacea. This fine shell may at times, after rough 

 weather, be found on the Hayle Sands. 



Cytherea Chione. Hayle Sands. They have much lustre and 

 depth of colour. 



Tapes aurea. Very frequent in Falmouth Harbour and at Helford 

 river, where the shells are more produced in shape and more elegantly 

 marbled than the ordinary run of specimens. At times on the Hayle 

 Sands, Milleit. 



Lucinopsis undata. Hayle Sands, Milleit. 



Lucina borealis. Fine specimens, but without the mollusk, are at 

 times abundant on the Hayle Sands. 



