HELIX ALBOLABRIS. 



207 



FIG. 201. 



FIQ. 203. 



FIG. 204. 



Fig. 201. Helix albolabris^ natural Mze. a, orifice of lung. Also the heart and 

 any of Limax flams, magnified. 



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

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



Fig. 203. NcTve-centres of Helix alholabris. 



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

 ffelix albolabris. 



