CRYPTOGAMS 



SPIROGYRA, DESMID, AND DIATOM 



PLATE VI 



FiglForton ofFilament ^ 2 M M ^^^ Io ^ 

 ofSpirogyra 



average length of aB. WOinA Ibread/k 



Fig.4 (Ms placed ui alcohol during division 



b division 



Fig. 6 Cells after Conjugation *. natural statu, fyj? 



Primordial utricle 

 Nucleus 



■ — Starch, -granules 



Fig. 3 Cell undergoing division 



3Wo ' •'[*' Jl\ Zoospores 



DIAGRAM 

 Arrangement of Spiral bands 





c further division 

 | . 



Fig. 7 Gemmation of Zygospore 



c Germination ■further advanced 



Fig. 5 Two Cells co7gugatmg 



a. . JUstmg Zygospore 



Septa formed 

 o . Germinating 



Innermost layer 

 protruded 



DESMID 

 Fig.8 Cosmanum Fig.9 Two cells conjugating FiglOSingk mass ^W-^ ^P& Zygospore 



b. end view c side view 



Figl2 Germinating Zygospore 



a. escaping . 



b. free 



FigJ3Diyidmg into (wonewDesmids 



DIATOMS 

 Fig.lS ' Frustuli/L saavnica conjugating 



c. further developed \ 



a- CeSs Conjugating 



b. Zygospores formed 



Fig. 14? Diatonuz vulgaris 



Gelatinous investment 



Side, view 



I 





in contact 



/* j. 





Tabes 

 Zygtispofts opened up 



::X 



LIFE HISTORr DM6MM 



of Conjugatac 



Division - 



Conjugate form 



Zygospore 



-Ll. 



> >A- fa*v .Atw "Hi, 







: *.V--«t ■fc'Tiirf 



Engrttvea, Printed and Published by "W & AX Johnston, Edmbrrrgh. 



