48 BULLETIN OF THE MUSEUM OF COMPARATIVE ZOOLOGY. 



PLATE III. 



Fig. 1. Lingual dentition of Euparypha levis. 

 " 2. Genital system of same. 



a. genital bladder. 



b. penis sac. 



c. vas deferens. 



d. vaginal prostate. 



Fig. 3. Lingual dentition of Triodopsis Sanburni. 

 ' ' 4. Jaw of Microphysa conspecta. 



5. Microphysa Ingersolli. 



" 6. Lingual membrane of Microphysa conspecta. 

 " 7. Same of Fruticicola Cantiana. 



8. Genital system of Polygyrella polygyrella. 



a. genital bladder. 



b. penis sac. 



c. vas deferens. 



d. retractor muscle. 

 Fig. 9. Pupa alticola. 



" 10. Pupa Arizonensis. 

 " 11. Pupa sublubrica. 

 " 12. Pupa hebes. 



