TAYLOR : VARIATION OF LIMNtEA PEREGRA. 30I 



feeling of the greatest perplexity how most correctly to desig- 

 nate the particular specimen or specimens combining those 

 complex characters. 



Size variation has been noticed by many authors, and 

 special varietal or sub-varietal names have been given by some 

 of those conchologists who have noticed the remarkable range 

 in size to which the species is liable. For shells considered un- 

 usually large, Kobelt has a f gigantea, but I have not seen the 

 dimensions he assigns to it. Pirona has a var. major, which has 

 a total length of 20 mill.; while Westerlund has several sub- 

 vars. of the same name, which he has applied to large specimens 

 of several form-variations, the largest being 36 mill, in length 

 and belonging to the var. anipiiUacca. 



Diminutive specimens, which are the L. pulhis of Zgl., 

 have received the name of intJior from several conchologists, 

 but in some cases they refer to different form-variations, and 

 vary in dimensions from a length of 6 mill, as given by Baudon, 

 to 12 mill, as given by Colbeau; the last-mentioned author has, 

 however, a variety UUiputlan.i, which will probably be nearly 

 identical in size with the variety mino?- of Dr. Baudon. 



Var. labiosa Jeffr. Shell with outer lip remarkably expanded and reflected. 



This variety, which I was compelled to relinquish the idea 

 of figuring, owing to the difficulty experienced in faithfully 

 pourtraying its characters by a simple outline, is a very remark- 

 able one, and its peculiar feature is at times so excessively 

 developed that the outer lip coils backward upon itself and 

 forms almost a complete tubular outer margin. 



The variety eversa von Martens is identical with Jeffreys' 

 labiosa, but with the peculiarity not so strongly expressed. 

 Hartmann's variety labrosus is probably another synonym. 



Var. Candida Porro. Shell white. 



This is an albine form of the species under consideration 

 with which the var. consobriua Zgl., described as 'semi-opaque 



