8o JOURNAL OF CONCHOLOGY. 



NOTE ON SOME MALFORMED SPECIMENS OF 

 LIMN^A PEREGRA. 

 By WM. nelson. 

 Whilst searching for shells in a pond at Allerton Ings, near 

 Castleford, on the 26th of March, I found a number of Limncea 

 peregra, a good proportion of which were curiously malformed. 

 The general form of the shells partook of the short spire, and 

 expanded aperture of the variety ovata ; in many cases the shell 

 had a well developed, reflected lip, after the manner of the 

 variety labiosa, but with no trace of the thickened rib of that 

 variety ; at this stage of their growth, they would have been taken 

 for complete adult shells ; but from some cause or other (no 

 doubt an abundance of food) the animals had found it necessary 

 to enlarge their shells ; this they had done by adding from one 

 quarter to one half a whorl, leaving the reflected lip forming an 

 acute ridge across the shell in the line of growth. In several 

 specimens the additional growth had been carried out very 

 unsymmetrically, the columella being very much twisted and 

 prolonged, causing the lower part of the aperture to be excess- 

 ively produced, this form of aperture evidently being unsuitable 

 for the animal, it had rounded off the irritating corner, by form- 

 ing a septum, and in one or two cases the aperture being too 

 large, an additional septum had been formed, causing the shell 

 to have an aperture of three different forms, at different periods 

 of its growth. 



Vitrina pellucida var. depressiuscuia Jeff — The 

 published habitats of this variety do not appear to have been 

 added to since the issue of Dr. Jeffreys' classical work, as 

 Rimmer gives only the localities previously cited by him, viz., 

 near Swansea and Plymouth. 



The woods on Cooper's Hill, near Cheltenham, may how- 

 ever be added to the already known localities, as I found this 

 variety there in April, 1866, whilst searching for Clausilia 

 Rolphii. — J. W. Taylor. 



J.C, iv., July, 1883. 



