V. RHODOMELACEiE. 25 



from the ramuli ; conceptacles ovate, terminal. Ag. Sp. Alg. 1, p. 376. Lophura 

 Jioccosa, Kiitz. Sp. Ahj. jy. 850. Fucusjloccosus, Turn. t. 8, Esper t. 100. 



Hab. Pacific coast at Port Trinidad, lat. 41° 12', Mr. Menzies. Sitcha, Ruprecht ! 

 Nootka Sound, Barclay ! Monterey, Dr. Coulter. Off the west coast, lat. 32°, Lieut, 

 Wood, H.M.S. " Pandora." (v. s. in herb. T. C D.) 



Frond 5-10 inches long, filiform below, soon compressed and becoming more 

 compressed toward the extremity, twice as thick as hogs' bristle, with a leading 

 stem which is once or twice pinnated in its upper half with lateral, alternate, erecto- 

 patent branches. Branches distichous, subsiniple, sometimes with a second series 

 from their upper half, regularly beset throughout with alternate, distichous, multi- 

 fid branchlets, one or tw(j lines in length. These branchlets are alternately decom- 

 pound, their lowest ramulus simple and subulate, those over it again and again 

 compounded ; each ultimate division of the frond slender, subulate, acute, incurved. 

 Conceptacles ovate, usually terminating the compound multifid branchlets, being 

 formed from their last developed ramuli. Stkhidia lanceolate, apiculate, formed of 

 the inner or upper ramuli of the branchlet, and containing a double row of tetra- 

 spores. Colour in the dry state dark bro^^^l or black ; probably red brown when 

 recent. Substance rigid. It does not adhere to paper in drying. 



A smaller and slenderer plant than the preceding, with distichous ramification 

 and a more developed axis to the multifid branchlets. It is closely related to 

 R. subfusca, but the habit is peculiar, and the compression of the frond an obvious 

 character. 



3. RiiODOMELA pilidi/era, Grev. ; frond robust, cartilaginous, terete or com- 

 pressed, decompound ; bi'anches distichous, alternate, distant, not much divided ; 

 ranmli few, scattered, subulate, the lowest short and spinelike, the upper somewhat 

 filiform ; conceptacles very large, globose, terminal or sessile near the ends of the 

 branches. Grev. Hist. Alg. Brit. p. li. Sphwococcus pilulifer. Ag. syst. p. 23(). 

 Fucus pilulifer or globulifer, Turn. Hist. t. 230. 



Hab. Nootka Sound, 1778, A. Menzies, Esq. (v. s. in Herb. Menzies.) 



Frond 6 inches long or more, twice or thrice as thick as hog's bristle, irregularly 

 decompound, but not much branched ; branches distant, alternately divided twice 

 or thrice, the penultimate divisions somewhat virgate, either naked or with a few 

 distant, short, spinelike, alternate, disticlious ramuli below, and several larger and 

 more filiform subulate ramuli in their upper half Branches and ramuli compressed 

 when dry, but becoming nearly terete when moistened. Substance very opaque 

 and rigid. Structure as in R. subfusca. Conceptacles larger than poppy-seed, sphe- 

 rical, terminating the branches or sessile near the ends of the ramuli. Colour very 

 dark. 



Turner rightly refers this species to the neighbourhood of R. sid)fusca. Indeed, 

 conceptacles apart, it is not easy to distinguish it from the battered, winter condi- 



E 



