PLATE XVII. 



Class MOLLUSCA e 



ODONTOPHORA. 

 THE EDIBLE SNAIL (Helix pomatia.} 



FIG. 1. SNAIL: EXTENDED, x 1. 



/. foot : 1. lip : e. eye upon t. one of the long tentacles : g. genital 

 opening : p. pulmonary opening. 



FIG. 2. SNAIL : CONTRACTED, WITH SHELL REMOVED, x 1. 



/. foot : c. collar : p. portion of the pulmonary chamber : r. position 

 of the reproductive organs, L of the liver, a. of the albumen 

 gland. 



FIG. 3. DISSECTION FROM THE LEFT SIDE, x 1. 



b. buccal mass : o. resophagus : m. muscle of the tentacle : c. y. 



cerebral ganglia: p. g. parieto splanchnic and pedal ganglia: 

 s. g. left salivary gland sending forwards its duct to the buccal 

 mass : c. crop : g. genital gland : /. tri-lobed liver : i. intestine : 



p. pulmonary vein from the lung : k. kidney : a. auricle : 

 v. ventricle. 



FIG. 4. REPRODUCTIVE SYSTEM, x 1. 



(j. hermaphrodite gland : d. its duct : a. albumen gland : o., o. 

 oviduct : i\, v. vas deferens : p. penis : f. flagellum : m. 

 retractor muscle of the penis : s. spermatheca : d. s. dart sac : 

 m. g. mucous glands : v. vagina. 



FIG. 5. LONGITUDINAL SECTION THROUGH THE BUCCAL MASS, x 2. 



m. mouth : b. buccal cavity : r., r. radula : c. cartilage : o. oesophagus : 

 g. gland of the foot. 



FIG. 6. RADULA. x 3. 



FIG. 7. PART OF THE EADULA, SHOWING THE TEETH, x 3 . 





