CARPOSPOREM. 



291 



hood of the trichophore are stimulated by the fertilisation to fresh growth, and develope 

 numerous closely-packed spores, each upon a short stalk (Fig. 189, B, g, h). In Lejol'isia 



Fig. xi^.—Herpothamtiion hermaphroditum. A a branch with a carpogoniumyand an antheridium an. 

 B the mature cystocarp after fertilisation (after Nageli). 



(Fig. 190) the carpogonium is also multicellular, and it is from its central cell that the 

 spores are developed, whilst the outer cells grow out into filaments forming a closed 



FIG. \<^.—Lejolisia mediterranea (after Bornet, X about 150). A a small piece of a creeping filament with a root hair and 

 an upright branch, its lowest cell bearing a branchlet with tetragonidia (tt). B a sexual (monoecious) plant ; w a root-hair of 

 the creeping stem, its apical cell situated at s, and its upright branches bearing the sexual organs ; a a antheridia, the axial 

 row of cells being however not indicated ; tg trichogyne by the side of the apex t of the fertile branch ; h the envelope 

 of the cystocarp ; sp a spore escaped from the cystocarp ; C an empty cystocarp, its envelope consisting of rows of cells. 



U 2 



