154 
Alga?, of Tasmania. 
30. Thamnophora procera, J. Ag. in Linnaea XV. p. 10. 
George Town, V. D. L., R. Gunn, Esq., 1278 in part.—In 
this species, and in T. Mertensii, Grev. I find an evident fine 
medial line running through the frond and branching otl' to 
each lacinia. The expression “ fronde ecostata” is rather too 
strong. 
31 Thamnophora costata, J. Ag. in Linnaea XT p. 10. 
George Town, V. D. L., R. Gunn, Esq., 1278 in part. A 
fragment only. 
32. Thamnophora angusta, J. Ag. in Linnaea XV. p. 10. 
George Town, V. D. L., R. Gunn, Esq., n. 1304. 
« 
Tribe 6. Cryptoneme®, J. Ag.. 
33. Chrysimenia coccinea, Harv.; fronde compressa (?), tubulosa, 
coccineS., circumscriptione pyramidali ; caule subindiviso vel 
furcato: ramis alternis v. vagis, erectopatentibus, dichotomy 
pinnatis, multifidis ; axillis sub-acutis ; ramulis ultimis erectis, 
basi vix constrictis, apice acutis ; coccidiis.? granule 
triangule divisis in ramulis ultimis nidulantibus. 
George Town, V. D. L., R. Gunn, Esq., n. 1301 .—Frond 
(a single specimen only seen) 4 inches high, tubular, with a few 
lax threads running through the centre, apparently compressed. 
Stem as thick as bristle, undivided, or nearly so, beset from near 
the base to the apex with alternate or spiral multifid erecto-patent 
branches, the lowest longest, the rest gradually smaller upwards, 
all of them divided in a manner partly dichotomous, partly p[ n _ 
nate, the branches very erect, and the ultimate ramuli elongate 
and acute, slightly constricted at base. Colour a fine pinky red. 
Substance membranous and tender, but not very gelatinous. 
Granules imbedded in all the ramuli. This plant has much the 
habit of Grucilaria, but not the structure. 
34. Halymenia membranacea, Harv.; fronde planfi, membra- 
nacea, pallide rubra, lineari, basi cuneata, vagh subdichotomo- 
pinnatim v. palmatim-fissa; segmentis patentibus, e margine 
ramenta lanceolata v. furcato-cuneata emittentibus; sphseros- 
poris (triangule divisis) per totain frondem sparsis. 
