ALG OF TASMANIA, 447 
venture to found a species upon them in a genus liable to 
such variations of form. It so closely resembles, in the 
dichotomous linear frond, bordered with ciliæ, some states of 
Rhodomenia bifida, that I at first regarded it as that species ; 
but the reticulations of the frond are very much larger, and 
evidently point to a place in Nitophyllum—Mr. Gunn’s 
n. 1282, is also a Nitophyllum in a young state, and probably 
new. 
29. Nitophyllum affine, Harv. ; caule brevi, carnoso, mox in 
fronde latissimé flabelliformi, laceratà, enervosà, membra- 
naceá, basi subopacá crassá expanso; segmentis sub- 
- pinnatifidis, sinubus rotundatis, soris granularum oblongis 
in segmentis ultimis longitudinaliter ordinatis. 
George Town, V. D. L., R. Gunn, Esq., n. 1272.—Nearly 
related to N. Gmelini, and strongly resembling the large 
Irish state of that plant, but differing in the position of the 
Sori. It rises with an evident stem which soon expands into 
the cuneate dark-coloured base of a flabellate membranous 
frond, 5 inches long and 7 inches wide, veinless, except for 
the fused indication of the stem at the base, thin and deli- 
cate, but probably crisp in a recent state, and only im- 
perfectly adhering to paper. It is deeply inciso-lacerate or 
many lobed, the segments coarsely sinuato-dentate or sub- 
Pinnatifid ; the marginal lobes blunt and shallow. Sori mi- 
nute, oblong or linear, ranged in longitudinal rows across the 
tips of the segments, or scattered over them ;—in our speci- 
men past their prime. 
30. Thamnophora procera, J. Ag. in Linnea XV. p. 10. 
George Town, V. D. L., R. Gunn, Esg., 1278 in part.—In 
this species, and in 7. Mertensii, Grev. I find an evident fine 
medial line running through the frond and branching off to 
Sach lacinia, The expression “ fronde ecostata" is rather too 
31. Thamnophora costata, J. Ag. in Linnea XV. p. 10. 
. George Town, V. D. L., R. Gunn, Esq., 1278 in part. A 
ent only. 
32. Thamnophora angusta, J. Ag. in Linnea XV. p. 10. 
George Town, V. D. L., R. Gunn, Esq., n. 1304. 
