HELIX ALBOLABRI8. 



247 



FIG. 198. 



PIG. 199. 

 o, orifice of lung. .Also the heart and 



Fi. 196. Helix albolabrvt, natural siz 

 tinz of Umax Ifantx, magnified. 



Fig. iVt.-JMw nllH.lHhn*. with the shell removed to show the heart (/<) and the 

 una; ; ,. mouth. This and Fists. 201-204 after Leidy. 



Fig. 198. -Nerve-centres of Helix albolabris. / 



Fiv. 199. Jaw (lower figure) and side and ton view of teeth of linaaal ribbon of 

 ffelix albolubris. 



