56 THE MARINE BOTANIST. 



fixed in the herbarium. Grows on rocks and 

 alg'se between tide-marks, and in a depth of from 

 four to fifteen fathom water. The variety ^ intri- 

 catay with very narrow and curiously- twisted fronds, 

 is equally common as the above form on our 

 shores. Annual. Summer. 



STILOPHORA. 



Name from a dot and to hear in allusion to the dot-like 

 fructification. 



Frond filiform, solid, or tubular, branched. 

 Fructification, Convex, wart-like sori, scattered 

 over the surface, composed of obovate spores. 



STILOPHORA RHIZODES.— ROUGH 

 STILOPHORA. 



Fronds slender, filiform, from six to twelve 

 inches long-, repeatedly branched, and pretty reg-u- 

 larly forked or branched in an alternate manner. 



