, HELIX ALBOLABRIS. 



367 



FIG. 203. 



FIG. 204. 



Fig. 201. Helix albolahins, natural pize. a, orifice of lung. Also the heart and 

 ung of Limax Jtatntt, magnified. 



Fig. 202. Helix albolabris, with the shell removed to show the heart (/ ) and the 

 Ting ; m, mouth. This and Figs. 201-204 after Leidy. 



Fig. 203. Nerve-centres of Helix albolaJbris. 



Fig. 204. Jaw (lower figure) and side and top view of teeth of lingual ribbon of 

 Helix albolabris. 



