FLORIDE& 215 



bourhood of the swellings, with a more or less regular annular arrange- 

 ment. The trichogyne is a long transparent cylindrical tube, simple or 

 branched, produced within the tubular thallus. The procarp is unicel- 

 lular, and of a very simple structure. The carpogone puts out before 

 impregnation a number of segmented filaments resembling paraphyses, 

 and enclosed in a transparent jelly. After the oosphere has been im- 



FIG. 192. A , Lemanea nodosa Ktz. (natural size). B, section of tube with female organs ; t, 

 trichogyne, at the base of which sporiferous filaments (.$) are beginning to be formed ( x 200). 

 C, transverse section of male organs ; a, antherids ( x 400). (After Sirodot.) 



pregnated, it puts out an ' ooblastema-filament,' and the trichogyne 

 disappears ; at the extremity of this filament are produced the carpo- 

 spores. 'On germinating the carpospore puts out a protonemal 

 filament somewhat resembling that of mosses, on which the fertile axes 

 are produced as lateral branches. This is regarded by some as a rudi- 



