156 
Alya of Tasmania. 
38. Spyridia? pellucida, Harv. ; frondibus e basi comrauni lata 
stuposa ortis, tenuibus, pellucidis, monosiphoniis, articulatis, 
roseis, vag6 sub-dichotomy raraosissimis : ramis ad quodque 
geniculum ramulis brevissimis subulatis oppositis v. verticillatis 
ornatis ; articulis diaraetro sesqui-v. subduplo longioribus. 
George Town, V. D. L., R. Gunn, Esq., 1305: also in the 
collection of 1840.— Fronds 6-6 inches long, as thick as those of 
Ceramium rubrum, several growing from the same shaggy base, 
and often matted together below, much and irregularly divided 
on a dichotomous type, the lesser branches generally alternate, 
straight; the apices not hooked in. Every part of the stem is 
clearly jointed, one-tubed and pellucid, but red-coloured, and all 
the larger and smaller branches, and the stems to their very base, 
are furnished at each joint with short, awl-shaped, opposite or 
cruciate ramuli, which are jointed like the stem, and more than 
half its diameter. These sufficiently mark the species from any 
variety of C. rubrum, and seem to indicate an affinity with 
Spyridia: but I am not sure that I am right in referring it to 
this genus, in preference to Ceramium, with which the structure 
of the frond more nearly agrees. 
39. Griffithsia setacea ? Ag. 
George Town, V. D. L., R. Gunn, Esq., n. 1290, 1302.—. 
These specimens are not in fruit, and have not been sufficiently 
displayed to show the ramffication; n. 1302, as well as it can be 
examined, seems identical with the European form ; n. 1290 is 
smaller, more slender, and may be different. 
40. Griffithsia fiabelliformis, Harv.; fronde latissime flabellata, 
petiolati, multoties dichotomk ; axilis inferioribus patentissimis, 
superioribus acutis; articulis inferioribus cylindricis, diametro 
4-5 plo longioribus; superioribus ellipticis geniculis maxime 
contractis; ultirais moniliformibus, attenuatis. 
George Town, V. D. L., R. Gunn, Esq., n. 1294.—A large 
species, 6 inches long, by 7 inches wide, twelve or fourteen times 
dichotomous. The lower axils very patent, the upper equally 
acute and close. Joints in the patent portion of the frond cylin¬ 
drical, 4-5 times longer than broad; in the erect or upper portion 
strongly contracted at the genicula, swollen in their middle, and 
