SYNOPSIS OF GROUPS. 



123 



Group HAPLOGONA Pils. 



3, Flammulina Mart., 10. 



Phacussa Hutt., 12. 

 Thalassohelix Pils., 12. 

 Gerontia Hutt., 14. 

 Allodiscus Pils., 14. 

 PyrrhattutL, 15. 

 Therasia Hutt., 15. 

 Phenacohelix Sut., 16. 

 Suteria Pils., 17. 

 Flammulina Mart., 17. 

 Hedleyoconcha Pils., 18. 

 Monomphalus Anc., 19. 

 Rhytidopsis Anc., 20. 

 <7arMo Hutt, 339. 



4, Phasis Alb., 36. 



Nesophila Pils., 27. 



Ptychodon Anc., 27. 



Helenoconcha Pils., 28. 

 Brazieria Anc., 29. 

 Phenacharopa Pils., 29. 

 jEschrodomus Pils., 30. 

 Paratrochus Pils., 31. 

 ? Coliolus Tap.-Can., 171. 

 Charopa Alb., 31. 



Acanthoptyx Anc., 35. 



Tropidotropis Anc., 36. 



Pterodiscus Pils., 36. 

 7, Pyraraidula Fitz., 42. 

 Pyramidula Fitz., 43. 



Microconus Streb,, 340. 



Patulattra Pfr., 44. 



Planogyra Morse, 45. 



Gonyodiscus Fitz., 45. 

 Lyrodiscus Pils., 341. 

 Lyrula Woll., 341. 

 Patula Held., 48. 

 Atlantica Anc., 50. 

 Helicodiscus Morse, 51. 



?SculptariaPfr.,39. 



5, Amphidoxa Alb., 39. 



Stephanoda Alb., 40. 



6, Endodonta Alb., 20. 



Dicjlyptus Pils. 22. 

 Libera Garr., 23. 

 Endodonta Alb., 24. 

 Thaumatodon Pils., 26. 



Group . 



8, Pararhytida Anc., 52. 



Platyrhytlda Ckll., 342, 53. 



Family HELICID^E Pilsbry (vol. ix, p. xxviii). 

 Group PROTOGONA Pils., xxxii (Polygyrinai). 



1, Praticolella Mart., 67. 



2, Polygyra Say, 68. 



Polygyra Say, 71. 

 Triodopsi* Raf., 74. 

 Stenotrema Raf., 77. 



3, Polygyrellu Binn., 78. 



Ammonitella Coop., 80. 



4, Polygyratia Gray, 81. 



Systrophia Pfr., 83. 

 ? Coxia Anc., 83. 

 ? Solaropsis Beck, 166. 



5, Dorcasia Gray, 172. 



