244 The Molluscan Family Plauorbidae 



PLATE 4 



Pingiella peipinensis (Ping and Yen). New genus 

 Peiping, China; from Fan Memorial Institute, Peiping, China. 



1. Albumen gland showing position of stomach. 



2. Portion of penial gland showing position of ducts. 



3. Terminal end of penial gland, imder side. 



4. Terminal end of penial gland, view from side showing internal canal. 



5. Penial complex showing long duct of penial gland and long and peculiarly formed 



appendages. 



6. Preputium cut open to show penial gland. 



7. Preputium cut open to show penial gland and relationship of long duct. 



8. Verge in vergic sac. 



9. General dissection of genitalia, the organs separated and extended. 



Line near figure indicates 1 mm. in length. Figures 3 and 4 

 are greatly enlarged. 



