306 The Molluscan Family Planorbidae 



PLATE 35 



Carinifex 



1. Carinifex ponsonbyi E. A. Smith. From Upper Klamath Lake, Oregon. 



1. Penial complex showing variation in muscle system. 



2-9. Carinifex jackso7iensis J. Henderson. From Jackson Lake, Wyoming; collected 

 by J. Henderson. 



2. Simimit of verge showing attachment of retractor muscles. 



3. Penial complex showing multiplication of retractor muscles and short penial 



gland duct. 



4. Pseudobranch and pneumostome. 



5. Genitalia dissected and organs separated. 



6. Portion of genitalia showing relationship of oviduct, sperm duct, ovisperm 



duct, etc. 



7. Same organs as in fig. 6, from above. 



8. Albumen gland. 



9. Another form of spermatheca. 



Line near figure indicates 1 mm. in length 



