XII 



Isocardiana, 33. Cardiaiia, 34. Cyrenoidana, 35. 



Cyreiiana, 36. Cjprinana. 

 K. Veneracea: 37. Glauconomyaria, 38. Petricolana, 



39. Veiierana, Isodoma, 40. Telliiiana, 41. Mae- 



trana. 

 A. Myacea : 42. MA^ochamaua, 43. Anatinana, 44. Cor- 



bulana, 45. Mjana, 46. Panopaeaiia. 

 /!*. Solenacea: 47. Siliquana, 48. Solenaiia. 

 V. Pholadacea: 49. Gastrochaeiiaiia, 50. Pholadana, 



51. Teredinaiia, 52. Furcellana. 



V. Prosopocephala, Scaphopoda, Larvenköpfe oder 

 Meerzähne. 



VI. G as t r o p o d a, Pselaphocephala , Fühlerköpfe oder 

 Schneeken. 



A. Pteropoda oder Coponautae, Ruderschwimmer. 



[a. Gjmnosomata : 1 . Pterocymotoceidae , 2. Clio- 



nidae.^ 3. Pnenioderniitae.] 

 ß. Thecosomata: [4. Cymbuliidae], 5. Conulariidae, 

 6. Tentacuhtidae', 7. Hyaleidae.^ 8. Thecidae. 

 9. Limacinidae. 



B. Opisthobranchia, Hinterkiemer. 



«. Notobranchia : [1. Phyllh-rhoidae , 2. PontoJima- 

 cidae, 3. Elysiidae, 4. Hermaeidae, 5. Aeolididae, 

 6. Glaucidae, 7. Dotonidae, 8. Proctonotidae , 9. 

 Heroidae, 10. Tritoniadae, 11. Tethydidae, 12. 

 Triopidae, 13. Dorididae^ 14. Onchidori^idae.J 



ß. Pleurobranchia : [15. Phyllidiidae, 16. Pleurophjd- 

 lidiidae, 17. Runcinidae, 18. PleurobranchidaeJ 

 19. Umbrellidae, [20. Lophocercidae ,] 21. Aply- 

 siidae, 22. PhiUnidae, 23. BulUdae, 24. Cylich- 

 nidae, [25. Amplustridae,] 26. Actaeonidae. 

 0. Heteropoda, Kielfüsser: 1. Pterotracheacea, [2. x4t- 



lantacea,] 3. Fossile Gattungen. 

 D. Prosobranchia, Vorderkiemer. 



a. Chitonidae : 1. Chitonidae. 



ß. Cyclobranchia: 2. PatelHdae. 



y. Aspidobranchia: 3. Fissureliidae , 4. Haliotidae, 

 5. Pleurotoniaridae. 6. Trochidae. 7. Neritidae. 



