14 JOURNAL OF CONCHOI.OGY, VOL. 1 3, NO. I, JANUARY, I9IO. 



Pembrokeshire. 

 Vertigo pygmaea (Drap.). — Gumferston, near Tenby. 



Cardiganshire. 



Planorbis spirorbis (L.). — Common in Borth Marsh, and near 

 Aberystwith. 



Planorbis crista (L ).— Abundant in pools at Borth. 



Pisidium pusillum (Gmelin). — Borth Marsh and pool near 

 Aberystwith. 



Pisidium nitidum Jenyns. — Pool, near Aberystwith. 



Note on Decollated Shells. —When collecting near Southwold this summer 

 I met with many decollated specimens of Bithynia tentaculata, B. leachii, and 

 Limncea peregra in brackish ditches near the river Blylh. The decollation was 

 most marked in Bithynia tentacj/Iata, some shells being reduced to 2| or 3 whorls ; 

 many specimens were also badly eroded. The shells of Linniiea peregra were also 

 much eroded and very thin. In most cases the animals were in poor condition, 

 from which I deduce that the deformity was due to the saltness of the water. 

 Sphariitm lactistre was plentiful and large in some of these brackish ditches, but 

 S. corneum was absent. Among the Limncea peregra was one scalariform speci- 

 nien. — J. E. Cooper {Read before the Society, Sept. 8th, 1909). 



Pisidium supinum A. Schm. in Bucks. — Among some Fisidia collected in 

 the Colne at Iver, Bucks., are a few P. sitpiniivt. They were living in mud. This 

 species seems to be found only in running water, and the finest examples live in 

 sand. — T- E. Cooper [Read before the Society, Sept. 8th, 1909). 



Assemania grayana in East Suffolk. — As this shell has been found very 

 sparingly in Suffolk hitherto (see. Journal of Conchology, xii., p. 281), it may be 

 worth noting that it lives in abundance on the banks of the Blyth near Blythlmrgh. 

 In size these specimens equal the finest T have from Sandwich and the Thames, and 

 in colour they are superior, some of them being unicolorous of a deep claret-red 

 tint. — J. E. COOPKR [Read before the Society, Sept. 8th, 1909). 



Crepidula fornicata L. on the Lincolnshire Coast. — I found some twenty 

 specimens, dead shells, somewhat worn, of this interesting mollusc on the shore at 

 Cleethorpes, early this year. — Walter Gyncjrll [Kead before the Society, Sept. 

 8th, 1909). 



Hygromia rufescens m. sinistrorsum at Peterborough. — Having an hour 

 only at my disposal in this city last month, I found the above in a nettle-bed within 

 a mile of the railway station. Though a dead shell, it is full grown, regularly 

 and otherwise perfectly formed. As usual with sinistral monstrosities, further care.- 

 ful search revealed no further specimens. — W. Gyncjkll [Read before the Society, 

 Sept. 8th, 1909). 



