LIST OF THE PLATES. 



XV 



PLATE CLXII. 



Figs. 1-5. Hyalotheca mucosa 



(p. 235) 

 6-9. #. undulata (p. 239) 



W.H. Imlica (p. 237) 

 11-15. #. neglectn (p. 238) 

 16-19. #. dixsiliens (p. 229) 



PLATE CLXIII. 



Figs. 1-4. Hyalotheca neglecta 



(p. 238) 



,, 5-10. DesniiiiiiDii Sira /'/:// 

 (p. 246) 



PLATE CLXIV. 



Figs. 1-6. Desmidium Apto- 



gotiuni (p. 242) 



7-10. D.cylim!n'rum(p. 249) 

 ., 11. D. occidentals (p. 245) 



Figs. 



55 

 55 



PLATE CLXV. 



1-4. De*in iiliiuii coarcta- 



tuw (p. 252) 

 5-6. D. pseudostreptonema 



(p. 244) 



7. D. Swartzii (p. 246) 

 8-10. Gymnozyga monili- 

 f or mis (p. 255) 



Figs. 



55 



Figs. 



J5 

 55 



55 

 55 



PLATE CLXVI. 



1 . Staurastru m C haves i i 



(p. 134) 

 2. St. brevispinum (p. 



269) 

 3. Euastrum laticolle (p. 



264) 

 4. Staurastrum Pseudo- 



sebaldi (p. 113) 

 5. Desmidium, gracileps 



(p. 252) 



6-7. D. quadrat um (p. 254) 

 8-9. Closterium tumid um 



(p. 263) 

 1 0. Gymnozyga )ii,on ///- 



for mis (p. 255) 

 11-13. Roy a anglica (p. 2 ">'.) 

 14. R. cambrica (p. 260) 



PLATE CLXVII. 



1-4. Oocardium ^ti-atmn 



(p. 204) 

 5. Euastrum mvnfrtiium 



(p. 265) 



6. Roya obtusa (p. 260) 

 7. ? Staurasti um iti- 

 jlexum (p. 108) 

 8-9. St. Meriani (p. 269) 

 10. Spondylosium Lun- 



dellii (p. 224) 

 1 1 . Micrasterias papilli- 

 fera (p. 266) 



