Illustrations 323 



Fig. 23-25. Oscillatoria splendida Grev. (After Lemmermann, Setchell and 



Gardner) 

 Fig. 26. Oscillatoria amoena (Kuetz.) Gom. (After Gomont) 

 Fig. 27. Oscillatoria subuliformis Kuetz. (After Gomont) 

 Fig. 28. Oscillatoria laetevirens Crouan. (After Gomont) 

 Fig. 29. Oscillatoria acuminata Gom. (After Gomont) 

 Fig. 30. Oscillatoria animalis Ag. (After Gomont) 

 Fig. 31. Oscillatoria violacea (Wallr.) Hass. 

 Fig. 32. Oscillatoria brevis Kuetz. (After Gomont) 

 Fjg- 33- Oscillatoria formosa Bory. (After Gomont) 

 Fig. 34. Oscillatoria cortiana Menegh. (After Gomont) 

 Fig. 35- Oscillatoria okeni Ag. (After Gomont) 

 Fig. 36. Oscillatoria chalybea Mert. (After Gomont) 

 Fig. ZT, 38. Oscillatoria boryana Bory. (After Gomont) 

 Fig. 39. Oscillatoria terebriformis Ag. (After Gomont) 

 Fig. 40. Trichodesmium erythraeum Ehr. (After Gomont) 

 Fig. 41, 42. Trichodesmium thiebautii Gom. (After Gomont) 

 Fig. 43. Trichodesmium contortum Wille. (After Wille) 

 Fig. 44. Arthrospira jenneri (Kuetz.) Stiz. (After Gomont) 

 Fig. 45- Spirulina meneghiniana Zan. (After Gomont) 

 Fig. 46. Spirulina major Kuetz. (After Gomont) 

 Fig, 47. Spirulina subtilissima Kuetz. (After Gomont) 

 Fig. 48. Spirulina caldaria Tilden. (Original) 

 Fig. 49. Spirulina subsalsa Oerst. (After Gomont) 

 Fig. 50, SI. Spirulina duplex Wolle. (After Wolle) 

 Fig. 52, S3. Phormidium fragile (Menegh.) Gom. (After Gomont) 

 Fig. 54. Phormidium' foveolarum (Mont.) Gom, (After Gomont) 

 Fig. 55. Phormidium tinctorium Kuetz. (After Gomont) 

 Fig. 56, 57. Phormidium luridum (Kuetz.) Gom. (After Gomont) 

 Fig. 58. Phormidium rubrum Tilden. (Original) 

 Fig. 59. Phormidium purpurascens (Kuetz.) Gom. (After Gomont) 

 Fig. 60, 61. Phormidium crosbyanum Tilden. (Original) 

 Fig. 62. Phormidium laminosum (Ag.) Gom. (After Gomont) 

 Fig. 63-65. Phormidium tenue (Menegh.) Gom. (After Gomont) 

 Fig. 66. Phormidium valderianum (Delp.) Gom. (After Gomont) 

 Fig. 67. Phormidium subuliforme Gom. (After Gomont) 

 Fig. 68. Phormidium incrustatum (Naeg.) Gom. (After Gomont) 

 Fig. 69, 70. Phormidium inundatum Kuetz. (After Gomont) 

 Fig. 71, 72. Phormidium corium (Ag.) Gom. (After Gomont) 

 Fig. 73, 74. Phormidium papyraceum (Ag.) Gom. (After Gomont) 

 Fig. 75, Phormidium interruptum Kuetz. (After Wolle) 

 Fig. 76. Phormidium naveanum Grun. ('After Wolle) 



PLATE V. 



Fig. 1-4. Phormidium r^tzii (Ag.) Gom. (After Gomont) 



Fig. 5. Phormidium ambiguum Gom. (After Gomont) 



Fig. 6. Phormidium submembranaceum (Ar. and Strafif.) Gom. (After 



Gomont) 

 Fig. 7, 8. Phormidium laysanense Lemm. (After Lemmermann) 

 Fig. 9, 10. Phormidium favosum (Bory) Gom. (After Gomont) 

 Fig. II. Phormidium calidum Gom. (After Gomont) 

 Fig. 12-15. Phormidium subfuscum Kuetz. (After Engler and Prantl) 

 Fig. 16, 17. Phormidium uncinatum (Ag.) Gom. (After Gomont) 

 Fig. 18, 19. Phormidium autumnale (Ag.) Gom. (After Gomont) 

 Fig. 20, 21. Phormidium setchellianum Gomont. (After Gomont) 

 Fig. 22, 23. Lyngbya lagerheimii (Mob.) Gom. (After Gomont) 

 Fig. 24! Lyngbya nana Tilden. (Original) 



Fig. 25, 26. Lyngbya ochracea (Kuetz.) Thur. (After Bornet) 

 Fig. 27-29. Lyngbya ferruginea G. S. West. (After West) 

 Fig. 30, 31. Lyngbya lutea (Ag.) Gom. (After Gomont) 

 Fig. 32, 33. Lyngbya aerugineo-caerulea (Kuetz.) Gom. (After Gomont) 

 Fig. 34. Lyngbya cladophorae Tilden. (Original) 



