84 BRITISH SEA-WEEDS. 



of that species, had terminal pods similar to those 

 ascribed to E. longifructus. I feel very little doubt 

 that these were only a variety of E. litoralis, and I 

 am inclined to believe that the two plants are but two 

 diflFerent forms of the same species. 



XSctocarpus granulosus. Granular Ectocarpus. 



Tufts growing on rocks, corallines, or sea-weeds, in 

 pools between the tide-marks, four to eight inches long. 

 Threads with a principal stem, from wliich spring side- 

 branches of unequal length, furnished with opposite 

 branchlets, the whole having a feathery appearance. Pods 

 elliptical, without stalks, scattered freely over the branch- 

 lets. 



This species is abundant, and its characters are not 

 difficult to make out, provided the specimens be in 

 fruit. 



Ectocarpus sphserophorus. Warted Ectocarpus. 



Tufts parasitical on small sea-weeds, an inch to three 

 inches high, very dense. Threads somewhat matted, hav- 

 ing many times divided branches. Pods spherical, with a 

 pellucid margin, seated on the branches, either opposite to 

 one another, or to a branchlet. 



This species, although found in several localities, is 

 nowhere abundant. It generally grows on Piilota ele- 

 gans, and less frequently on Cladophora rupestris. 



Ectocarpus brachiatus. Cross-branched Ecto- 

 carpus. 



Tufts two to four inches high, feathery. Threads ex- 

 cessively branched ; branches and branchlets opposite, 



