2cS2 JOTIRNAI. OF CONrilOl.OOV, VOL. 12, NO. ID, APRIL, I909. 



*Dreissensia polymorpha (Pallas), 



E. — The late Mr. J. B. Bridgnian recorded the occurrence of this 

 species in Breydon, half of which is Suffolk water. 

 Anodonta cygnaea (L.)- Rather connnon. 



E. — Campsey Ash, Barham (A.S.K.), Tattingstone (CM.). 



W.— Barton Mere, Cockfield (C.B.). 

 var. anatina L. 



E. — Barham, Campsey Mere (Sheppard), Ipswich (iV.M.). 



W.— Bures (C.B.), Hopton (A.M.). 

 var. zellensis Jeff. E.— Blaxhall (G.T.R.). 

 Unio pictorum (L.). Rare. E. — Ipswich (A.M.). 

 [*Sphaeriuni rivicola (Leach). There were at one time in Ips- 

 wich Museum some examples of this shell, labelled " Ipswich," but 

 that they were really found in that locality is very doubtful]. 

 S. corneum (L.). Common. 



E. — Campsey Ash, Blythburgh, Wenhaston (.A..S.K.), Stow- 

 market, Ipswich, Orford, Hoxne (A.M.). 



W.— Cockfield (C.B.), Bury St. Edmunds, Hopton (A.M.). 

 S. lacustre (MiiUer). Not common. 



E.— Blythburgh, Wenhaston (A.S.K.), Offton (Sheppard). 



W.— Sudbury (King), Barton Mere (C.B.). 

 Pisidium amnicum (MiiUer). Not common. 



E.— Ipswich (A.M.). 



W.— Sudbury (King), Bury St. Edmunds (A.M.). 

 *P. henslowianum (She^jpard). Occasional. 



E. — Holbrook (Sheppard), Needham Market (A.M.). 



W.— Sudbury (King), Mildenhall (A.M.). 

 P. subtruncatum Malm. *W. — Mildenhall (A.M.). 

 P. pulchellum Jenyns. Not common. *\V. — Mildenhall (A.M.). 

 *P. nitidum Jenyns. Not uncommon. 



E.— Mendlesiiam (A.M.). W.— Wetherden, Mildenhall (A.M.). 

 P. obtusale Pfeiffer. Not uncommon. 



*E. — iMendlesham, Lowestoft (A.M.). 

 P. gassiesianum Dupuy. W. — Knettishall (A.M.). 



Vertigo antivertigo (Drap). in Northants. — On Oct. 3rd, 1908, accompanied 

 by two members of our Society, Messrs. Cattell and Freeman, I went to search a 

 spot which I had previously noted as a likely habitat for species of Vertigo in a 

 hitherto unworked corner of the county, near Wadenhoe and Aldwinkle. This 

 is a considerable tract of bog land, with bog bean and cotton grass in places. 

 Taking home a quantity of moss, etc., from the most promising spots, I found 

 amongst the siftings three specimens of the above species, thereby adding another 

 to the county list. — C. E. Wright (Read before the Society, Nov. nth, 1908). 



