298 NEW YORK STATE MUSEUM 



PLATE 5 



Fig. 



1 A view from the under side of the head, showing the mouth 



and lips, x5. 



2 The jaw, x 10. 



3 The digestive organs; 1 the buccal body; 2 esophagus; 2' 



the crop; S salivary ducts; 4 salivary glands; 5 stomach; 

 6 intestine; 7 rectum; 8 anus; 9 digestive gland; 10 ducts 

 of digestive gland; 11 ventricle; 12 auricle; IS pericar- 

 dium; IJf kidney or renal organ all x 2. 



4 Crop and salivary gland, x 6. 



5 Heart and kidney as seen from the exterior. 



PLATE 6 



Fig. 



The lettering on each of the figures refers to the same organ. 



1-6 Transverse sections of the body from the buccal body to 

 near the posterior extremity of the foot. 



1 genital opening; 2 penis; 2^ sac of radula; S esophagus; Jf 

 salivary duct; 5 tentacular muscles; 6 vas deferens; 7 

 peritoneum; 8 pedal isinue; 9 oviduct; 10 vagina; 11 uter- 

 ine canal and spermatic duct; 12 the mantle. 



7 The stomach and a part of the intestine as seen from above 



8 The stomach as seen from below, showing also the ducts of 



the digestive gland and their connection with the stom- 

 ach. 



PLATE 7 

 Generative organs 



Fia. 



1 1 genital aperture; 2 penis; S outer fold or prepuce; Jj 

 vagina; 5 receptaculum seminis; 6 vas deferene; 7 free 

 oviduct; 8 uterine canal; 9 spermatic duct; 10 talon, or 

 accessory gland of the hermaphroditic duct ; 11 hermaph- 

 roditic duct; 12 ovotestes; IS retractor muscle of the 

 penis; IJf albumen gland, all x 3. 



