LIMAX. 25 



and as if crystalline beneath. The eggs are transparent 

 and perfectly globular. 



This scarce species differs from Soiverbii not only in 

 colour, and the points already noted, but also in relative 

 proportion of shield and body, the former being much 

 larger in gagates. The description and figures of Dra- 

 parnaud agree too well with the specimens we have ex- 

 amined to admit of a doubt of the correctness of the 

 identification. It was first noticed as an inhabitant of 

 the British Isles by the Rev. B. J. Clarke, who found 

 it in several localities in Ireland. Dr. Robert Ball found 

 it near Dublin, whence living examples were kindly trans- 

 mitted to us by Mr. Kelly. Mr. W. Thompson, Dr. 

 Ball, and Prof. E. Forbes found it near Clifden, in Con- 

 nemara. We have taken it under stones in the open 

 country near Castle Martyr in Ireland, and in similar 

 places at Peel Castle in the Isle of Man (E. F.). The 

 first and only example as yet met with in England was 

 found by Mr. Darbyshire under a stone at the foot of 

 a thorn hedge in Portland Island, in September, 1851. 

 This specimen is a very dark variety, and has that jetty 

 hue on the back, which induced Draparnaud to name the 

 species as he did. 



VOL. IV. 



