43 



6, 



Astasiaea 



Genera 



L 6. 



species 



24. 



7. 



Dinobryonia 



a 



2. 



(( 



3. 



8. 



Amoebaea 



et 



1. 



ii 



4. 



9. 



Arcellina 



ti 



3. 



i( 



9 to 



10. 



Bacillaria 



li 



36, 



li 



168 



11. 



Cyclidina 



ii 



3. 



ii 



9. 



12. 



Peridinaea 



(C 



4. 



u 



17. 



13. 



Vorticellina 



(I 



8. 



<( 



35. 



14. 



Ophrydina 



tt. 



4. 



l( 



IL 



15. 



Enchelia 



a 



10. 



t( 



30. 



16. 



Colepina 



u 



1. 



(C 



57. 



17. 



Trachelina 



11 



8. 



(( 



38. 



18. 



Ophryocercina 



a 



1. 



ii 



3. 



19. 



Aspidiscina 



a 



1. 



li 



2. 



20. 



Kolpodea 



li 



5. 



ii 



27. 



21. 



Oxytrichina 



ii 



5. 



a 



17. 



22. 



Euplota 



ii 



4. 



li 



12. 



ROTATORIA 



Comprehends 8 Families, 55 Genera, 169 Species. 

 Fam. 1. Ichthydina Genera 4. Species 5. 



2. 



Oecistina ' 



2. 





2. 



3. 



Megalotrochaea ' 



3. 





3. 



4. 



Floscularia ^ 



6. 





7. 



5. 



Hydatinaea ' 



18. 





71. 



6. 



Euclanidota ' 



11. 





36. 



7. 



Philodinaea * 



7. 





18. 



8. 



Brachionaea ' 



4. 





27, 



Tiie following list of Infusoria, found in and near Salem, 

 Mass., is arranged according to the system of Professor 

 Ehrenberg. 



POLYGASTRICA 



3 Fam. Volvocina. 10 Genera, IS Species. 



