Sarcodia.] 
ix. alga:. 
687 
tomous filaments which radiate from a central receptacle. Tetraspores 
scattered, transversely divided, 
A genus of a single species. 
1. S. Montagneana, J. Ag. Sp. Alg. ii. 623; — FI. JV. Z. ii. 242. 
Frond 4-8 in. long, cuneate at the base, then expanding into dichotomous 
lobes 1£ in. broad, tips often truncate and proliferous ; axils obtuse. — Rho- 
dymenia Montagneana, Hook. f. and Harv. ; Harv. Ner. Austr. t. 48. Rhodo- 
'phyllis Montagneana , Kuetzing. 
Bay of Islands, J. J). H., Lyall. 
59. GEACILARIA, Greville. 
Frond dull red, cartilaginous, cylindric, compressed or rarely flat, irregu- 
larly branched ; structure of two strata ; medullary of large angular colour- 
less cells, surrounded by smaller coloured ones ; cortical of minute coloured 
cells in vertical lines. Conceptacles conical or hemispherical, sessile, thick- 
walled, at length opening by a pore, enclosing obovate spores arranged on a 
tuft of filaments. Tetraspores cruciate or 3-parted, scattered beneath the 
cortical cells. 
A large genus, found in both temperate zones. 
1. G. confervoid.es, Grev. ; — FI. N. Z. ii. 243. Fronds tufted, pur- 
ple, subcartilaginous, 2 in. to 2 ft. long, as thick as a sparrow- or crow-quill, 
very variable in branching, etc. ; branches long, undivided ; branchlets subse- 
cund, filiform close-set, filiform attenuate at both ends. Conceptacles hemi- 
spherical, extremely numerous. Tetraspores also abundant, on thickened fili- 
form branchlets. — Harv. Phyc. Brit. t. 65; J. Ag. Sp. Alg. ii. 587. 
Probably common, from Hawke’s Bay, Colenso, to Buapuke, Lyall. (Native of both tem- 
perate oceans.) 
2. G. multipartita, Harv., var. polycarpa, J. Ag. Sp. Alg. ii. 601. 
Frond between cartilaginous and membranous, 4-12 in. high, dull purple, 
flattened, cleft to the base palmately or dichotomously ; segments linear- 
cuneate, acute, entire, jagged or multifid. Conceptacles scattered over the 
whole surface of the frond. — Harv. Phyc. Brit. t. 15 ; J. Ag. Sp. Alg. ii. 
601. 
Blind Bay, Cook’s Straits, Lyall. (Native of both temperate and tropical oceans.) 
3. G. coriacea, Harv.;- — FI. N. Z. ii. 243. Closely resembling G. 
multipartita, but much thicker, more coriaceous, minutely wrinkled when dry, 
and the tips of the segments obtuse. Conceptacles deeply sunk in the frond, 
depressed at the apex with a large pore. — Rhodymenia ? coriacea , Hook. f. and 
Harv. in Lond. Journ. Bot. iv. 545. 
Bay of Islands, Cook’s Straits, Lyall ; Otago, Lindsay. 
60. MELANTHALIA, J. Agardh. 
Frond deep purple, linear, flat, dichotomously flabellately branched, coria- 
ceous, solid, densely cellular ; inner substance of colourless elongate angular 
