FLORWEJE 



207 



discs attached to rocks, or on the leaves of Zostera, or on other seaweeds. 

 The sexual reproductive organs and the lion-sexual organs of propaga- 

 tion are alike formed in small cavities or conceptacles, which are either 

 entirely imbedded in the thallus, or more often form external wart-like or 

 ovoid swellings. The female conceptacle opens at the apex by an ostiole 

 (fig. 182, a); the very short sporiferous filaments, the terminal cells of which 



V 



ft \ 



FIG. 184. Coraliina rubens L. a, branch with three cystocarps and a male conceptacle ; con- 

 ceptacles of Melobesia, Thureti Born, are attached to the upper part of the branch ( x 20) ; , longi- 

 tudinal section through a male conceptacle deprived of its calcareous incrustation ( X 160) ; c, pol- 

 linoids(x 400). (After Bornet.) 



become the carpospores, spring from the base of the cavity, and are 

 accompanied by paraphyses. The male conceptacles are of similar 

 structure ; the pollinoids (fig. 182, d) possess one or two short appen- 

 dages. The non-sexual present a general resemblance to the sexual 

 conceptacles ; the tetrasporanges spring from their base and sides, and 

 are accompanied by paraphyses ; the contents of the sporange not un- 



