APPENDIX. 



DASYA PUNICEA. 



Colour. Bright rosy crimson; fading to yellow and whitish. 



Substance. Soft, and somewhat gelatinous; soon decomposing in fresh water. 



Character of Frond. Thread-like {filamentous); irregularly, much branched; bushy; 

 the principal branches widely spreading and bearing many short branchlets 

 on each side. Stems unjointed; the older ones worn naked and smooth; 

 tlie younger, throughout the plant, closely set with rings {whorls) of very 

 slender, delicate, soft, jointed branchle^eew5. These branchle2fe<?w-9, i of an 

 inch long; many times forked; tapering to a point; their joints from 4 to 6 

 times as long as broad. 



Measurement. From 2 to 3 inches long, and as much in the spread of the branches. 



Fructification. Of two kinds; external. 1. Clustered spores, in broadly ovate capsules 

 with a short protruding mouth {urceolate); seated (sessile) on the branchlets. 

 2. Tetraspores in lanceolate, pointed, pod-like receptacles {stichidia) \ on the 

 branchle^^e6;^5, 



Habitat. Bognor, October, 1858, Mrs. Gray. Brighton, July and August, 1859, 

 Mrs. Merrifield. 



This interesting addition to the list of British Seaweeds resembles Agardh's 

 Trieste species, J), pvnicea, so closely, that Dr. Harvey believes it mny be the 

 same, although differing in one particular character; viz. the length of the 

 joints of the branchleiee?is. Those of Agardh's plant being short; of the 

 present form, long. 



DASYA CATTLOYI^.P 



A form not yet described, from the fact that only one specimen, and that a barren 

 one, has as yet been found. This unique treasure was discovered floating at very 

 low water in St. Aubin's Bay, not far from Elizabeth Castle, Jersey, in August, 

 1858, by Miss Mary Cattlow. Externally, it bears some likeness to an Australian 

 species, D. Gunniana; but its characters come nearest to those of the Mediterranean 

 species, D. punicea, above described as having been lately found on the British 

 shores. Dr. Harvey considers D. CattlovicB more robust, however, and its branclez'ee^^5 

 more generally distributed, and is inclined to think it may prove a distinct species. 



It is mentioned here in the hope that such an announcement may induce other 

 collectors to make diligent search for more specimens. 



Family IX. WEANGELIACE^. 



NACCAEIA HYPNOIDES. 



Colour. Delicate rosy-red. 



Substance. Yery soft and gelatinous; adhering closely to paper in drying. 



Character of Frond. Slender; thread-shaped {filiforni); profusely branched; solitary 

 or tufted. Stems wide in proportion to the branchlets; once or twice forked; 

 set with long, wavy, horizontally-spread, opposite or alteiT.ate branches, tapering 

 gradually upwards, and several times rebranched. Branches clothed with very 

 slender-jointed branchlets; these furnished at every joint with rings {whorls) 

 of minute, bead-like branchleteens, once or twice forked, and forming a little 

 frill round each joint. Structure of the stem, an internal jointed tube, 



91 



