46 JOURNAL OF CONCHOLOGY, VOL. 12, NO. 2, APRIL, I907. 



Ford Lane by Mr. J. Ray Hardy ; Haweswater by Mr. J. W, Jackson ; 

 the Cove by Mr. R. Standen. Arnside : — Top of the Knott, Mr. R. 

 Standen, Several specimens were taken also last August by Mr. H. 

 Beeston and myself at the foot of the Knott. Grange-over-Sands : — ■ 

 Humphrey Head by Mr. C. H. Moore ; Low Meathop by Mr. C. H. 

 Moore in 1903. The appearance of this shell in the spring corre- 

 sponds with that of the larger Helices (see Helix aspersd). A hurried 

 visit to Silverdale on May 9th showed most of the shells to be mature 

 and copulation in active progress. 



var. ochraleuca Moquin-Tandon. — At above localities. 



Two specimens, taken by me in 1903 at Silverdale, correspond 

 to the continental form — var. violaceus de Moulins. 



Acicula lineata Draparnaud. — Grange-over-Sands (R. Standen) 

 1897, (C. H. Moore) 1903. 



var. alba Jeffreys. — Grange (F. Booth), 1906. 



Neritina fluviatilis L. — Common in the river Lune at Lancaster, 

 Caton, and Kirkby Lonsdale (David Dyson) 1850. Also very 

 common in the Lancaster Canal. Specimens here are often very much 

 eroded (see note on Dreissensid). Recorded for the brook at Cark 

 (Jackson and Moore), 1903. Also at Glasson Dock (J. R. Charnley), 

 1906. Mr. Charnley tells me that specimens here are much larger 

 than any taken elsewhere in the district. 



Dreissensia polymorpha Pallas. — In 1903 some fine specimens 

 were taken in the canal, north of Lancaster, in the crevices of the 

 stonework near the bridges. Unfortunately, all specimens taken 

 recently are eroded to such an extent as to be worthless from a col- 

 lector's point of view. Many of the larger NeritincR are eroded to the 

 same extent. Other species have not been affected. The introduc- 

 tion of some foreign substance, rather like paint, in 1904, may 

 possibly have have had something to do with it. Some very fine 

 specimens are to be obtained at Glasson Dock (J. R. Charnley) 1906. 



Unio margaritifer L. — In "The Land and Freshwater Shells 

 of the Districts around Manchester," by David Dyson, there is an 

 interesting account of what perhaps is the first record for this shell at 

 the locality given. As the above little booklet is now somewhat scarce 

 a short quotation may not be out of place: — " In the autumn of 1849 

 I visited the river Lune. At a place called Caton, about five miles 

 above Lancaster, I found these shells in abundance. They can be 

 seen from the banks of the river when the water is clear. They lie 

 between the stones in the mud, with the ends pointing up. On tak- 

 ing a small stick and putting it between the valves, the animal will 

 close the shell, and then it is easily lifted out of the water. But the 

 better way is at once to go into the stream, as this will save time. 



