XV 



PULMONATA — STYLOMMATOPHORA 



441 



Ariolimax^ Greomalacus^ Anadenus (subg. Propliysaoii)^ Hem- 

 2?hlllia^ Cryptostracon^ Binneya^ Helix (see below), Coclilostyla^ 

 Bulimus (subg. Bonis, OrpJuius, Dryptus, Strophochilus, Pachy- 

 otiis, and possibl}" Caryodes, Leitcotaenia, Liparus, Livinhacea, 

 Pachnodus, Rachis, Atopocochlis, Oerastus, Clavator belong here, 

 or with Bulimhius^, Berendtia, Rliodea. Pilsbry proposes ^ to 

 group Helix as follows : 



A. Eggs or young very large at birth : 



(1) Macroon, incl. Aeavus, Pyrochilus (^ = Phania), Stylo- 

 donta, Helicophanta. 



B. Eggs or young smaller or minute at birth : 



(2) Belogona. — Female genital system with dart sac and 

 mucus gland. Helix [restricted] (with 

 sections Arionta, Campylaea, Chilotrema, 

 Pomatia, Macidaria, Taehea, Iberiis, Lep- 

 taxis, Eulota, Fruticicola, Xeropliila ; 

 Borcasia, Acusta, Plectotropis, Aeyista, 



Cat/iaica, Satsuma, Euhadra ; Lysmoe^, 



Gonostoma, Leueochroa, Allognathus, 



Cocldostyla, Polymita, Hemitroehits 



(with sections Plagioptyclia, Bialeuca, 



Cory da, Jeanerettia), G-lyptostoma, Acan- 

 thimda, Vallo7iia. 



(3) Teleophalla. — Female system 

 without accessories, male with flagellum 

 and appendix on penis ; no epiphallus. 

 Sag da, Cysticopsis. . 



(4) Epipliallopliora. — Female sys- 

 tem Avithout acessories, male with 

 epiphallus on penis ; no appendix. 



Caracolus (with sections Lucerna, Dentellaria, Isomeria, Lahy- 

 rinthiis, Eur y crater a, Parthena, Polydontes, Theliodomiis, Cepo- 

 lis), Camaena (incl. Phoenicohius), Obha, Chloritis (incl. Hadra^, 

 Papuina, Planispira (subg. Cristigibba'). 



(5) Haplogona. — All accessor}^ organs absent, jaw soldered 

 into one piece. Polygyra (incl. Daedalochila, Triodopsis, Meso- 

 don, Stenotreiiui), Endodonta (incl. Libera, Charopa, G-erontia, 

 Therasia, and others), Patula, Trocliomorpha, Anoglypta. 



(6) Polyplacogiiatlia. — All accessory organs absent, jaw 

 com2JOsed of 16-24 separate plates. Punctum, Laoma, 



1 Proc. Ac. Philad. 1892, p. 390. 



Fig. 295. — Example of the 

 Macroon group of Helix. 

 Helicophanta Souverhiana 

 Fiscli., Madagascar, show- 

 ing large embryonic shell. 



