PLATE XL 



FIG. 113. 



Antheridia of Chara fragilis: A, antheridium or "globule" developed at the base of pislillidium or 

 "nucule;" B, nucule enlarged, globule laid open by the separation of its valves; c, one of the valves. 



with its group of antheridial lilameuts, each composed of a linear series of cills, within every oii!> of 

 which an antherozoid is formed : in D, E, and F, the successive stages of this formation are seeii ; and at 

 G is shown the escape of the mature antherozoids, 11. (From Carpenter.) 



Development of Prothalium of Pterls terrul<ita:A, spore set free from the theca; B, spore beginning 



to germinate, putting forth the tubular prolongation a, from the principal cell b ; c, fisst formed lineaT 

 series of cells: D, prothallium taking the form of a leaf-like expansion; a first and 6 second radical 

 fibre ; c, d. the two lobes, and e the indentation between them ; /, f, first-formed part of the prothallium ; 

 g, external coat of the original spore ; h, h, antheridia. (From Carpenter.) 



