254 



HELICELLA. 



Genital system (pi. 69, fig. 10, H. candidula^. Dart sack single 

 and simple; mucus glands consisting of four tubes. Appendix 

 wanting. Flagellum very short. See also pi. 69, fig. 9, H. caperata. 

 In some species (pi. 69, fig. 13, H. striata) there are two dart sacks 

 with two accessory sacks, and about 11 mucus glands. 



Distribution, Middle Europe and circum-Mediterranean region. 



It is probable that two sections will be distinguished in this group, 

 the division to be based on the number of dart sacks ; but at present 

 so few species have been dissected that such division is not possible, 



H. acutistria Bttg., iv, 10. solitaria Poir. 



H. agrioica Bgt., iv, 9. v. alpicola Stab., iv, 10. 



H. andalusica Kob., viii, 160. v. thymorum v. Alt. iv, 10. 



H. apicina Lam., iv, 5. v. gratiosa Zgl., iv, 10. 



cenuia, Char p. 

 hispidula Risso. 

 cupani Calc. 

 v. ramburi Mab., iv, 6. 

 v. requieni Moq. 

 v. miihlfeldtiana Zgl. 

 v. citharistensis Bgt. 

 v. psaropsis Loc. 

 v. marsiana Bgt. 

 H. armillata Lowe, iv, 15. 

 lowei P. & M. 

 eumceus Lwe. 

 H. arrouxi Bgt., iv, 12. 

 H. bardoensis Bgt., iv, 7. 

 H. braidensis Poll. 

 H. calymnia Mts., viii, 179. 

 H. camerata Mouss. 

 H. candidula Stud., iv, 10. 

 unifasciata Poir. 

 bidentata Dkr. 

 graphiea Hartm. 

 rugellosa Hartm. 

 striatula Hartm. 

 azona Audr. 

 unizona Andr. 

 radio lata Andr. 

 elegans Flem. 



strigatula Hartm. 

 adnumerata Parr, 

 v. spirilla West, 

 v. vortex West, 

 v. albocinctella Colb. 

 v. namurcensis Colb. 

 v. lunulata Kryn. 

 v. mellse Pini. 

 v. iriana Poll, 

 v. vincse Paul. 

 H. cantabrica Hid. 

 H. caperata Mont., iv, 14. 

 v. lauta Lwe. 

 v. barcinensis Bgt., iv, 14. 

 mirandce Ramb. 

 iberica Ramb. 

 v. diniensis Ramb. 

 H. carascalensis Fer., vi, 103. 

 H. cisalpina Jan. 

 H. cistorum Morel. 

 H. codia Bgt., iv, 16. 

 H. conspurcata Drap., iv, 12. 

 radiolata Jan. 

 cetncea Ben. 

 v. illuviosa Nev. 

 v. psara Bgt. 

 H. cyparissias Parr., iv, 11. 



