21 6 Quarterly Jour?ial of Conchology. 



NOTE ON LIMN^A STAGNALIS. 

 By William Nelson. 



This species has the power (occasionally at any rate), when 

 irritated, of discharging a pale violet coloured liquid. Having 

 observed many times, that in scalding the animal of this species, 

 previous to cleaning out the shells, that the water was tinged with 

 violet, I was led to pay particular attention to them in the living 

 state; and found that they discharged this coloured liquid some- 

 times at once upon being lifted out of the pond, but more often 

 if irritated. 



Helix hispida var. albida. — This variety has occurred some- 

 what commonly during the present spring, several specimens having 

 been reported from Wakefield, Sandal, Seacroft, Roundhay, Whin- 

 moor and other places. — Jno. W. Taylor. 



Clausula biplicata var. Nelsoni. — In March, 1866, while 

 collecting this species on the bank of the Thames, at Hammersmith, 

 from thtj trunks of the willow trees, near its margin, I found a 

 variety, which on being submitted to Dr. Jeffreys some time after- 

 wards he named as above at my request, after my colleague Mr. 

 Wm. Nelson. 



It is rather more slender than the usual form, almost totally 

 devoid of striation, and translucent, the axis being visible through 

 the shell; the last whorls are tinged with a very pale reddish brown, 

 passing into whitish on the upper whorls. — Jno. W. Taylor. 



Clausiiia biplicata var. albida. — I may record here that 

 in September, 1876, while at Heidelberg in Germany, I found a 

 beautifully pure white and fine specimen among the herbage in 

 the vicinity of the castle. — Jno. W. Taylor. 



