466 



BOTANICAL GAZETTE 



[JUNE 



Fig. 52. — Four-celled auxiliary cell branch; part of chromatin in nuclei of 

 cells 1 and 3 in granules distributed on linin net; cell 4 contains 2 nuclei; 



Xiooo. 



Fig. 53. — Four-celled auxiliary cell branch; sporogenous filaments lying 



under cell 3 ; X 1000. 



Fig. 54. — Sporogenous filament lying near 4-celled auxiliary cell branch; 



X550. 



Fig. 55. — Auxiliary cell branch showing structure of chromatophores ; 



Xiooo. 



Fig. 56.— Auxiliary cell branch; 5 carpospores budded off from auxiliary 

 cell; sporogenous filament fused with auxiliary cell; Xiooo. 



Fig. 57. — Auxiliary cell branch; auxiliary nucleus has divided; spo- 

 rogenous nucleus has just entered auxiliary cell; Xiooo. 



Fig. 58. — Section through auxiliary cell branch and 8 young carpospores; 

 auxiliary nucleus and sporogenous nucleus at opposite ends of auxiliary cells; 

 Xiooo. 



Fig. 59. — Section through auxiliary cell branch and group of young 

 carpospores; auxiliary cell and one carpospore shaded; sporogenous filament 

 fused with auxiliary cell; Xiooo. 



Fig. 60. — Section through auxiliary cell branch and group of mature 

 carpospores; auxiliary nucleus and sporogenous nucleus at opposite ends of 

 auxiliary cell ; X550. 



PLATE XXII 



Fig. 61. — Same sporogenous filament as in fig. 75 showing cytoplasm 



nucleus and chromatophore at tip; 



000 



Fig. 62. — Section through young cystocarp; 2 of the 18 carpospores which 



have arisen from auxiliary cells binucleate; 



000 



Fig. 63. — Section through young cystocarp showing origin of radial 

 branches which will form pericarp; X350. 



a. 



Figs. 64, 65. — Partly shaded; sections of mature 

 structure of nuclei, distribution of chromatophores, and protein granules; 



carpo 



Xiooo. 



Figs. 66, 67. 



carpospores 



spores 



of 



similar 



X700. 



Fig. 68.— Transverse section of thallus showing 3 normal and 2 abnormal 



cystocarps; X350. 



Figs. 69, 70, 71. — Sections through carpospores in abnormal cystocarps 

 showing that nuclear division is not always directly followed by cell division; 



700 



Fig. 72. 



germinating carpospore 



Xi7° 



Fig, 73. — Chromatophores of germinating carpospores; X14 00 



