Alge, by W. H. Harvey.] FLORA OF TASMANIA. 297 
cimens) roundish-ovate, with wide mouths, sessile on the ramuli, or near the tips of their lesser divisions. Zetraspores 
(on Tasmanian specimens) in an irregular double row in the ultimate ramuli. 
Gen. XLVI. CHONDRIA, Ae, 
(J. Ag. ref. Harv. in Ner. Bor. Amer. pt. 2. p. 19. Fl. N. Zeal. p. 223.) 
1. Chondria dasyphylla (Ag. Sp. Alg. i. p. 350).—Laurencia dasyphylla, Grev. ; Harv. Phyc. 
Brit. t. 152. Fucus dasyphyllus, Turn. Hist. t. 22, etc. 
Has. Common at Georgetown. Derwent, Oldfield. 
The Tasmanian specimens are frequently of very large size, 3-4 feet long, and excessively branched. Such 
specimens grow in the deeper and more rapid parts of the Tamar channel. 
2. Chondria verticillata (Harv.) ; fronde tereti succosa siccitate badia bis-terve umbellatim divisa, 
ramulis fasciculato-verticillatis saccatis oblongis obtusissimis basi-constrictis, tetrasporis in ramulis nidu- 
lantibus.—Harv. in Trans. R. I. Acad. xxii. p. 539; Alg. Austr. Exsie. n. 161. 
Has. Georgetown, rare, R. Gunn, Rev. J. Fereday. 
9. Chondria tenuissima (Ag.).—Laurencia tenuissima, Grev. ; Harv. Phyc. Brit. t. 198. Fucus 
tenuissimus, Zurn. Hist. t. 100 (?) | 
Has. Georgetown, R. Gunn. 
4. Chondria opuntioides (Harv.) ; fronde inferne cartilaginea solidescente obsolete constricta 
dichotoma, superne di-trichotoma articulato-constricta membranacea succo aquoso repleta, ramulis ad 
genicula verticillatis articulatis, articulis ramorum puncto affixis (cito in aqua dulci sejunctis) ovali- 
oblongis basi et apice obtusissimis, cystocarpiis ovatis sessilibus.—Chylocladia opuntioides, Harv. Trans. 
R. I. Acad. xxii. p. 556. C. Tasmanica, Lond. Journ. iti. p. 444. Catenella major, Sond. Pl. Preiss. 
(fide sp. !) Rhabdonia Sonderi, J. 49. (not of Harv.). (Tas. CLXXXIX.) 
Has. Georgetown, etc. ; common. 
Disrris. West and south coasts of Australia. 
Fronds a foot to 18 inches high, and as much in expansion, tufted, excessively branched in a di-trichotomous 
manner. Main stem solid, cylindrical and continuous in its lower part, becoming more or less constricted upwards 
at intervals of about an inch, then becoming regularly articulato-constricted, hollow, succulent, and filled with 
watery juice, dichotomous or fasciculately branched ; lesser divisions frequently trichotomous, strongly constricted, 
beset at the constrictions with more or less abundant, whorled, articulated, simple or dichotomous ramuli. Artieu- 
lations elliptical or oblong, readily separating. When thrown into fresh-water, the whole frond rapidly breaks up 
the branches and ramuli falling off in single joints, leaving a bare stem, with a few of its principal divisions. 
Oystocarps ovate, sessile on the sides of the ramuli. Teiraspores of large size, imbedded in the ultimate ramuli. 
Colour a full red, rapidly given out in fresh-water. Substance, when quite fresh, cartilaginous, but very juicy, and 
soon becoming flaccid. In drying, it most closely adheres to paper. 
I suppose this to be the Chylocladia articulata of Australian botanists, as it appears to be found commonly 
along the whole southern coast, and often assumes the habit of the true C. articulata of Europe, though differing 
greatly from that plant in substance, structure, and fructification. At first I referred the present species to Dees 
but the discovery of cysfocarps and tetraspores on Tasmanian specimens compels eg removal into Chondria, whore 
it associates naturally with C. clavata and C. verticillata.—Prate CLXXXIX. Fig. 1, a frond, the natural size ; 
2, ramulus, with tetraspores ; 3, a tetraspore ; 4, ramulus, with conceptacle ; 5, spores from the same: the latter 
figures magnified. 
5. Chondria ?? bulbosa (Harv.); fronde coccinea a basi ramosa, ramis primariis basi incrassato- 
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