RHODOPHYCE.E, OR FLORIDE^E 



217 



much-branched fertile filaments form the carpospores, 

 either from their terminal cells only or from the upper 

 cells as well. The whole of this complex is generally 

 enclosed within a definite cystocarpic wall. 



Stcnogramme, a small genus of wide distribution 

 is represented on our shores by one somewhat rare 



FIG. 66. Stenoflramme interrupta. 

 highly magnified, (b, after Johnson.) 



a, plant reduced ; &, carpogonium 



species, S. interrupta. Its fruits occur in a more or 

 less continuous midrib-like line on the frond. This 

 line increases in distinctness and becomes convex as 

 the fruits form. When the fertile line of procarpia 

 is ready for fertilisation, the superficial layers of 

 thallus-cells increase in numbers and ultimately 

 form the fruit wall, while the cells in the centre of 

 the frond increase in size and richness of contents. 



