HELIX ALBOLABRI8. 



247' 



FIG. 196. 



FIG. 198. 



FIG. 199. 



Fig. 196. Helix albolabria, natural size. , orifice of lung. Also the heart and 

 ling of Limn.r Janix, magnified. 



Fig. 197. Helix albolabrif:,vt\\\\ the phell removed to show the heart (A) and the 

 ling ; m, mouth. This mid Figs. 201-204 after Leidy. 



Fig. 198. Nerve-centres of Helix albolabrvt. 



Fis. 199. Jaw (lower figure) aud side and ton view of teeth of lingual ribbon of 

 Selix albolabrii. 



