Illustrations 325 



PLATE VII. 



Fig. I. Nostoc linckia (Roth) Born. (After Bornet and Thuret) 



Fig. 2. Nostoc piscinale Kuetz. (After Cooke) 



Fig. 3. Nostoc carneum Ag. (After Lemmermann) 



Fig. 4. 5- Nostoc spongiaeforme Ag. (After Cooke) 



Fig. 6-10. Nostoc ellipsosporum (Desm.) Rab. (After Bornet and Thuret) 



Fig. II. Nostoc gelatinosum Schousb. (Original) 



Fig. 12-14. Nostoc muscorum Ag. (After Bornet and Thuret) 



Fig. IS. Nostoc humifusum Carm. (After Cooke) 



Fig. 16. Nostoc foliaceum Moug. (Original) 



PLATE VIII. 



Fig. I. Nostoc commune Vauch. (After Hansgirg) 

 Fig. 2. Nostoc sphaericum Vauch. (After Cooke) 

 Fig. 3. Nostoc calidarium Wood. (After Wood) 

 Fig. 4. Nostoc maerosporum Menegh. (After Cooke) 

 Fig. s. Nostoc microscopicum Carm. (After Cooke) 

 Fig. 6, 7. Nostoc glomeratum Kuetz. (After Kuetzing) 

 Fig. 8. Nostoc caeruleum Lyngbye (Original) 

 Fig. 9, 10. Nostoc pruniforme (Linn.) Ag. ((After Cooke) 

 Fig. 11-16. Nostoc verrucosum (Linn.) Vauch. (After Thuret) 

 Fig. 17-19. Nostoc amplissimum Setch. (After Setchell) 

 Fig. 20. Nostoc parmelioides Kuetz. (After Gomont) 



Fig. 21, 22. Wollea saccata (WoUe) Born, and Flah. (After Engler and 

 Prantl) 



PLATE IX. 



Fig. I, 2. Nodularia harveyana (Thwaites) Thur. (After Bornet and Thu- 

 ret) 

 Fig. 3. Nodularia sphaerocarpa Born, .and Flah. (After West) 

 Fig. 4. Nodularia paludosa WoUe. (After Wolle) 

 Fig. 5. Nodularia hawaiiensis Tilden. (Original) 

 Fig. 6. Nodularia armorica Thur. (After Bornet and Thuret) 

 Fig. 7, 8. Nodularia spumigena var. litorea (Kuetz.) Born, and Flah. 



(After Bornet and Thuret) 

 Fig. 9. Anabaena variabilis Kuetz. (After Hansgirg) 

 Fig. 10-13. Anabaena hallensis (Jancz.) Born, and Flah. (After Jan- 



czewski) 

 Fig. 14. Anabaena flos-aquae (Lyngb.) Breb. (After Engler and Prantl) 

 Fig. IS. Anabaena circinalis Rab. (After Hansgirg) 



Fig. 16. Anabaena inaequalis (Kuetz.) Born, and Flah. (After West) 

 Fig. 17. Anabaena catenula (Kuetz.) Born, and Flah. (Original) 

 Fig. 18. Anabaena laxa (Rab.) A. Br. (After Bornet and Flahault) 

 Fig. 19. Anabaena torulosa (Carm.) Lag. (After Cooke) 

 Fig. 20. Anabaena oscillarioides Bory. (After Hansgirg) 

 Fig. 21. Anabaena confervoides Reinsch. (Original) 

 Fig. 22. Anabaena cupressdphila Wolle. (After Wolle) 



PLATE X. 



Fig. I. Aphanizomenon flos-aquae (Linn.) Ralfs. (After Engler and 

 Prantl) 



Fig 2 Cylindrospermum stagnate (Kuetz.) Born, and Flah. (After 

 West) 

 Cylindrospermum comatum Wood. (After Wood) 

 Cylindrospermum majus Kuetz. (After Gomont) 

 Cylindrospermum minutum Wood. (After Wolle) 

 Cylindrospermum muscicola Kuetz. (After Kuetzing) 

 Cylindrospermum catenatum Ralfs. (Original) 

 Richelia intracellularis J. Schm. (After Lemmermann) 

 Aulosira schauinslandii Lemm. (After Lemmermann) 



