48 FRESH-WATER ALG.E OF THE UNITED STATES. 



CLASS II. CHLOEOPHYCE^:. 



ORDER II. CONFERVOIDE^E. 



Section. O OSPORE^E. 



FAMILY V. Coleochaetacese. 

 Genus 9. Coleochaete. 



FAMILY VI. Oedogoniacese. 



Genus 10. Oedogonium. 

 " 11. Bulbochete. 



FAMILY VII. Sphaeropleacese. 



Genus 12. Sphaeroplea. 

 " 13. Cylindrocapsa. 



Section. SYNZOOSPOREJE et A8EXUALI8. 

 FAMILY VIII. Confervacese. 



Genus 14. Prasiola. 



" 15. Enteromorpha. 



Section. CLADOPHORIN^E. 



Genus 16. Draparnaldia. 



" 17. Stigeoelonium. 



" 18. Chaetophora. 



" 19. Microthamnion. 



" 20. Aphanoehaete. 



" 21. Gongrosira. 



" 22. Ghroolepus. 



" 23. Cladophora. 



FAMILY IX. Pithophoracese. 

 Genus 24. Pithophora. 



Section. ULOTRICHINJE. 



Genus 25. Ulothrix. 



" 26. Schizogonium. 

 " 27. Conferva. 



28. Chaetomorpha. 

 " 29. Rhizoclonium. 



ORDER III. SIPHONED. 



FAMILY X. Vaucheriacese. 



Genus 30. Vaucheria. 

 FAMILY XI. Botrydiacese. 



Genus 31. Botrydium. 



ORDER IV. PBOTOCOCCOIDE^E. 



FAMILY XII. Volvocacese. 



Genus 32. Volvox. 

 " 33. Eudorina. 

 " 34. Pandorina. 

 " 35. Euglena. 

 " 36. Gonium. 



