DEAN : LAND AND FRESHWATER SHELLS OF MORECAMBE AND DISTRICT. 43 



Succinea putris L. — Not very common. In some of the ditches 

 in the Lancaster district ; also at the Leighton Beck at Hale ; finest 

 at the aqueduct near Lancaster in June or July. 



var. albida Morch.— The aqueduct, Lancaster (J.W.J. ), 1903. 



S. elegans Risso. — More general than the last. Specimens do 

 not apparently reach the average size ; those from the aqueduct, which 

 is again the best locality, average ten millimetres in June or July. 



S. oblonga Draparnaud. — Early in 1903 I noticed a number of 

 fossil Succinece at Hale Moss, and a later investigation revealed 

 numbers of the living specimens crawling on the surface of the marl. 

 Examples of these fossil Succinecs were submitted by Mr. A. S. 

 Kennard, F.G.S., to Dr. O. Boettger, of Frankfort, who pronounced 

 them to be Succinea oblonga, the nearest living form being var. agono- 

 stoma Kobelt. On comparing the shells from Haweswater, Silverdale, 

 both recent and fossil, with the Hale Moss shell, there can be no 

 doubt that they are the same species, the only difference being that 

 of size. 



Carychium minimum Miiller. — Records are incomplete for this 

 species. Common in the Lancaster area ; Warton ; Silverdale and 

 district; Caton (R.S.), 1887; Grange-over-Sands (R.S.). 



Ancylus fluviatilis Miiller. ^ — Common in several of the becks 

 in^ the district. Fine at Brantbeck, Ellel, Lancaster ; in the river 

 Lune at Caton and Kirkby Lonsdale. Fine specimens can be taken 

 in April. 



var. gibbosa Bourgeois. — Beck at Caton (R.S.) ; also in beck 

 at Melling, higher up the valley. 



var. albida Jeffreys. — Ayside, near Higher Newton (C. H. 

 Moore), 1902 ; beck near Cark Station (Jackson and Moore). 



Acroloxus lacustris L. — In the canal at Lancaster. 



var. albida Jeffreys. — Several from near the aqueduct were of 

 this form. Mature in June and July. 



Limnaea auricularia L. — " In some pits near Lancaster, it 

 is of a very elegant shape, far surpassing any found elsewhere " 

 (David Dyson, 1850). These pits I have never been able to find. 

 It occurs locally in the canal, Garstang, Broken-Back Bridge, and at 

 the, aqueduct, near Lancaster, but is of a small size. It also occurs 

 sparingly in the Lune, with Z. pereger, above the aqueduct. In May 

 and June, after which time it seems to disappear. 



L. pereger (Miiller ^;/i). — -Everywhere, seemingly, in pond, ditch, 

 canal, or river. This species varies so much that a full list would 

 take up far too much space. Maturing time is given in each case. 



Type. — Nice specimens in the Torrisholme district, between 

 Lancaster and Morecambe, in the ditches which there abound ; July. 

 Brantbeck near Lancaster ; May and June. 



