386 The Molluscan Family Planorhidae 



PLATE 75 



Bulinus contortus (Michaud) 

 Genitalia copied from Larambergue, 1939a, p. 93 



4. General dissection of genitalia and fore part of body. 



5. Penial complex cut open to show characteristics. 



6. Carrefour of the genitalia. 



Explanation of symbols on the plate: A, atrium; Al, albumen gland; 

 Bb, buccal sac; C, junction of preputium with vergic sac (col); C '^ , 

 ovisperm duct (canal hermaphrodite); C Al, duct of albumen gland; 

 Cd, vas deferens (canal deferent); G, preputium (gaine) ; G ^, ovo- 

 testis (glande hermaphrodite); Od, oviduct; P, pilasters (piliers mus- 

 culaires) ; Pc, spermatheca (poche copulatrice) ; Pe, verge (penis); Pp, 

 vergic sac (poche du penis); Pr, prostate; R, retractor muscle; Sp, sperm 

 duct; Ut, uterus; Va, vagina. 



Vertical line indicates size in millimeters 



