AMPHIPEPLEA. 215 



" Limneus involutus. Harvey MS S. — Spire sunk 

 within the outer whorl; aperture very large, 

 extending to the apex. 



" A few specimens of this beautiful shell were col- 

 lected by my friend William Henry Harvey, Esq., 

 of Limerick, in a small alpine lake on Cromag- 

 laun Mountain, Killarney, in the month of April, 

 1832 ; and believing them to be of a new species, 

 were by their discoverer designated by the above 

 name. 



** Of three specimens sent to Belfast by Mr. 

 Harvey, and contained in my own cabinet and in 

 those of Dr. Drummond and Mr. Hyndman, the 

 largest is 5|^ lines in length and 3^ in breadth ; volu- 

 tions four, the largest enveloping the other three, 

 none of which are visible in the profile of the shell ; 

 aperture very large, wide at the base (showing the 

 columella throughout its entire length), and extend- 

 ing to the apex; margin reflected only where it joins 

 the pillar. 



" Shell polished, extremely thin, of a pale amber 

 colour, with coarse longitudinal striae. It approaches 

 L. glutinosus more nearly than any other species ; 

 but in consequence of the aperture extending to the 

 apex, has, at a cursory view, a greater resemblance 

 to Bulla akera than to any other British shell, 

 their similarity being rendered still more striking by 

 the columella having the same appearance in both 

 species." 



Amphipeplea luzonica, which has the greater part 

 of the shell covered with the mantle, even in the ani- 

 mals preserved in spirits, much resembles this species. 

 F 4 



