Ser. Melanospepme.*. Earn. Fucacece. 



Plate XIV. 



SPLACHNIDIUM RUGOSUM, Qrev. 



Gen. Char. Root discoid. Frond without distinct organs, cylindrical, 

 proliferously branched ; branches saccate, filled with slimy gelatine, 

 the cortical stratum thin and membranous. Sjwre-cavities scattered 

 over the whole frond, attached to the inner surface of the cortical 

 stratum, and communicating with the surface through a pore, 

 dioecious. Spores linear-oblong, subsessile. Faranemata simple. 

 — Splachnidium (Grev.), from cnrXa^fyyov, bowel ox gut. 



Radix discoidea. Frons, organis nidlis discretis, cylindracea, prolifera ; minis 

 saccatis, intra stratum corticate membranaceum succo mucoso repletis. Sca- 

 phidiaper totam frondem sparsa, infra stratum corticate appensa, cum ostiolo 

 superjiciati per canalem communicantia, dioica. Sporce oblongo-lineares, 

 subsessiles. Faranemata simplicia. 



Splachnidium rugosum, Grev.  



Splachnidium rugosum, Grev. Syn. p. xxxvi. Harv. Gen. S. A. PI. p. 394. 

 Endl. Brd Suppl. p. 29. Kiitz. Phyc. Gen. p. 350. Hook, and Harv. Ft. 

 Nov. Zeal. v. 2. p. 215. J.Ag.Sp.Alg. v. I. p. 186. Kiitz. Sp. Jig. p. 585. 

 Harv. Alg. Aastr. Fxsicc. n. 45. 



Dumontia rugosa, Suhr, Beitr. 1840, p. 275. 



Fucus rugosus, Linn. Mant. p. 311. Turn. Hist. t. 185. Ag. Sp. p. 100. 

 Ag. Syst. p. 280. A. Rich. Ft. Nov. Zeal. p. 141. 



Hab. On rocks, near low- water mark. Port Phillip Heads, Victoria ; and 

 at Newcastle, N.S. Wales, W. H. H. Georgetown, Tasmania, Mr. 



Gimn. 



Geoge. Distil. Cape of Good Hope !, New Zealand !, Indian Ocean (Jide 

 J. Ag.). 



Descr. Root a small, conical disc. Fronds one or several from the same base, 

 4-8 inches long ; the main frond quite simple, linear-clubshaped, tapering 

 to the base, cylindrical for the greater portion of its length, and truncate at 

 the extremity, furnished throughout its length with lateral branches or 

 secondary fronds similar in all respects to the primary, and springing pro- 

 liferously from its sides. These branches are constricted at base, bag-like 

 and truncate at the extremity, and in luxuriant specimens emit tertiary 

 bag-like ramuli. The bag-like fronds and branches have a thin, coriaceo- 

 membranous periphery or cortical stratum, beneath which is a large plexus 

 of interwoven longitudinal and transverse filaments, and the whole cavity 

 is filled with transparent, slimy jelly, through which a few filaments extend. 

 There are neither vesicles nor proper receptacles. The spore-cavities are 

 thickly scattered over every part of the frond, one being seated beneath 

 each of the mammseform pores which dot the whole surface ; they are 



