Alge, by W. H. Harvey.) FLORA OF TASMANIA. 309 
Fronds 6-12 inches long, excessively and densely branched, the principal branches long and virgate, several 
times compound, the ultimate branches an inch or two in length, simple, attenuated. All the branches and their 
divisions are very erect. The older parts of the frond, though pellucidly articulate and ecorticate, become shaggy 
with stupose filaments, which issue from the dissepiments, and are deflected downwards like rootlets. Every articu- 
lation of the branches and ramuli bears a pair of opposite ramelli, which are very erect or appressed, simple or 
branched from the base, often pinnulated in the lower part, but always with a long excurrent point. Tetra- 
spores are scattered on the pinnule of the ramelli. Cysfocarps unknown. Substance gelatinous and soft. Colour 
a rosy-red. 
6. Wrangelia mucronata (Harv.); dense cespitosa, frondibus roseis rigidiusculis capillaribus 
dichotome ramosissimis ecorticatis articulatis ad genicula verticillatim ramellosis, ramellis subternis furcatis 
v. trifurcatis cellula terminali minuta subulata acute mucronatis, tetrasporis in cymis subapicalibus dispo- 
sitis, articulis ramorum longissimis, ramellorum diametro 6-8-plo longioribus. (Tas. CXCI. B.) 
Has. Tasmania, Æ. Gunn. (Very rare?) | 
Fronds 6-8 inches long, densely tufted, capillary, of nearly the same diameter throughout, pellucidly articulate, 
excessively branched in a more or less regularly dichotomous manner. Every dissepiment bears a whorl of mostly 
three ramelli, about a line in length, and two or three lines distant. These are generally forked, or often trifid, each 
arm of the fork being composed of one long cell, tipped by a minute, thorn-like terminal cell. The tetraspores are 
borne in little cymes, formed out of the ramelli, near the ends of the branches. The colour is a deep rosy-red. The 
substance is membranous, and the plant only imperfectly adheres to paper in drying.—This appears to be a very 
distinct species, allied to W. myriophylloides, but abundantly different.—Piare CXOL B. Fig. 1, a tuft, naf. 
size ; 2, frustule of a branch, with whorled ramelli; 8, a ramellus; 4, a fertile ramellus, with tetraspores ; 5, tetra- 
spore :—the latter figures magnified. 
7. Wrangelia setigera (Harv.); fronde crassiuscula cartilaginea corticata decomposite ramosis- 
sima, ramis elongatis pluries alterne decompositis erecto-patentibus, ramulis plus minus articulatis ad 
genicula verticillatim ramellosis, ramellis setaceis simplicissimis patentibus cylindraceis obtusis, articulis 
ramorum diametro equalibus ramellorum subtriplo longioribus, cystocarpiis secus ramos sparsis pedicellatis, 
tetrasporis ad latera ramellorum sessilibus.—Spyridia filamentosa, 8 verticillata, Harv. in Lond. Journ. iii. 
p. 449. Spyridia Tasmanica, Kütz. Sp. Alg.! p. 666; J. Ag. Sp. Alg. ii. p. 342! (Tan. CXCI. 4.) 
Has. Georgetown, R. Gunn, W. H. H. 
Distris. Port Phillip, W. H. H. 
Frond 12-18 inches long, much branched and bushy. In external habit it strongly resembles Spyridia fila- 
mentosa, for a variety of which plant we once held it. The eystocarpic fruit, now first ascertained, is estad that 
of a Wrangelia; with no other recorded species of which genus has the present species much — KELATE 
CXCI. A. Fig. 1, a frond, the natural size; 2, frustule of a branch, with tetrasporiferous ramelli; 3, a ramellus 
with tetraspores; 4, frustule of a branch with a cystocarp; 5, spores and paranemata from the same; 6, a 
paranema :—the latter figures magnified. à; 
"beer IV. CORALLINEZ. 
Gen. LIX. AMPHIROA, Zr. 
(Lamour. Cor. Flex. p. 294. Harv. Ner. Austr. p. 95. J. Ag. Sp. Alg. ii. 529.) 
1. Amphiroa charoides (Lamour.; Harv. Ner. Austr. p. 96. t. 39; J. Ag. Sp. Alg. ii. p. 539). 
Has. Sea-shores, common. 
DisrRiB. Australia. 
VOL. II. 
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