ALG& OF TASMANIA. 453 
mariis tripinnatis, articulatis, pellucidis, glabris; pinnis 
similibus sed tenuioribus; pinnulis penultimis (vel plu- 
mulis) patentibus, tenuibus, flexuosis, simpliciter pinnatis ; 
articulis diametro 3-4-plo longioribus; sphzerosporis mi- 
nutissimis, spheericis, brevé pedicellatis basin versus pin- 
nellarum ultimarum secundis. 
George Town, V. D. L., R. Gunn, Esg., n. 1308.—Stem 
5-6 inches long, or more, setaceous below, gradually at- 
tenuated upwards, continued throughout the broadly ovate, 
excessively pinnated frond, opake and subsetose below, pel- 
lucid and naked above: all the divisions alternate. Main 
branches very patent or horizontal, 2-3 inches long, about 
half the diameter of the stem, pellucid and jointed; the 
joints 4-5 times longer than broad, triply pinnate, the pinnæ 
resembling the main rachis. Pinnules and their divisions 
very slender and patent, filiform, blunt. Colour a fine rose 
red, without any gloss when dry. Substance membranaceous, 
not very gelatinous. Spherospores exceedingly minute, 
secund along the ultimate ramuli near their bases, 4-5 on 
each ramulus, spherical, on short stalks. - 
44. Callithamnion cruciatum, Ag. 
George Town, V. D. L., R. Gunn, Esq.—These épecimens 
do not materially differ from the more slender British states 
of this variable, but easily recognised species, and are equally 
distinguished by the darkened tips of the branches, caused 
by the crowding of the ramuli about them. 
SERIES II. MELANOSPERME on FUCOIDEJE. 
Tribe 8. SPonRocuwxorpEE, Grev. 
45. Sporochnus radiciformis, Ag. (Fucus radiciformis, Zire. 
t. 189.) 
George Town, V. D. L., R. Gunn, Esg., 1284, 1293. 
Tribe 9. DicryoTrEx, Grev. 
46. Stilophora australis, Harv.; fronde cartilaginea, filiformi, 
alterne bi-tripinnatim ramosa; ramis primariis elongatis, 
indivisis ; secundariis tertiariisque laxe insertis, simplicis- 
simis, strictis, acutis, basi attenuatis; verrucis ellipticis, 
