84 LI MAC ID &. 



have been developed from them after having been 

 dried eight times successively in a furnace," B.C. 



5. L. L^'viS,* MtJLLER. PL. VI. bis. 



Body slender, nearly smooth, exceedingly glossy, as if coated 

 with moist varnish, dark brown with a violet tinge ; mantle 

 large, obtusely rounded in front and behind, wrinkled, hinder 

 part very tumid and of a pale yellowish-brown colour, with an 

 approach to transparency ; tentacles short, thick, bulbs rather 

 tumid ; foot narrow, sole ash-colour ; tail ending in a slightly 

 obtuse point ; slime thin, almost colourless ; respiratory orifice 

 placed towards the centre of the right margin of the mantle. 

 Length from \ to f inch. 



Shell unguiform, very convex above, nearly flat underneath, 

 solid, slightly glossy, with a few rather indistinct lines of growth, 

 and numerous fine, irregular microscopic lines which intersect 

 one another in some places, and in others are forked like a 

 herring-bone ; nucleus terminal ; margin sharp and slightly 

 incurved, not membranous. 



Inhabits moist places, among moss and dead leaves 

 and under stones and logs of wood, in many parts 

 of this country. It is an active little creature ; if 

 touched when it is crawling, it arches its body like 

 the Geometridce or " Looper " caterpillars, and when 

 in this position the mantle, owing to the great con- 

 vexity of the shell, becomes exceedingly tumid, re- 

 sembling the hump of the dromedary. When at rest 

 the animal is somewhat like a small leech. 



6. L. TENEL'LUS,t MtJLLER. PL. VI. bis. 



Body smooth, glossy, and almost transparent ; colour 

 greenish-white, the shield yellowish, and the tentacles and head 

 black ; occasionally marked on each side with an obscure whitish 



Smooth. t Tender. 



