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COLLEGE ZOOLOGY 



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Fig. 181. — Diagram showing the anatomy of a snail, Helix pomatia. 

 I, pharynx; 2, oesophagus; 3, salivary glands; 4, stomach; 5, liver; 6, rectum; 

 7, anus; 8, kidney; g, ureter; 10, opening of ureter; //, ventricle; 12, auricle; 



13, pulmonary vein; 14, opening of nephridium into pericardium; 15, ovo- 

 testis; 16, common duct of ovotestis; 17, albumen gland; 18, female duct; 

 iq, male duct; 20, spermatheca; 21, flagellum; 22, accessory glands; 23, penis; 



14, dart sac; 25, vagina; 26, eye tentacle retracted; 27, anterior tentacle 

 retracted; 28, muscle which retracts head, pharynx, tentacle, etc. (From 

 Shipley and MacBride, after Hatschek and Cori.) 



