Hormosira .] 
IX. ALGJE. 
653 
branched, moniliform ; internodes inflated, fertile. Fruit dioecious. Con- 
ceptacles sunk in the periphery of the internodes, containing subsessile nar- 
row-pyriform spores and unbranched peranemata. 
A small genus, confined to Australia and New Zealand. 
1. H. Billardieri, Mont.; — FI. N. Z. ii. 215. Frond 6-18 in. long, 
very variable in size and robustness ; internodes obconical, wingless. — J. Ag. 
Sp. Alg. i. 199. Moniliformia, Bory. Manilla, A. Rich. 
Var. a. Banlcsii ; Harv. Ner. Aust. iii. 135. f. 2. Frond divaricate, with spreading 
branches and wide angles ; internodes cuneate, depressed at the summit, the terminal ovoid. 
Var. p. Labillardieri, Harv. 1. c. p. 3. Frond elongate, 2-3-chotomous, with narrow 
angles ; internodes ovoid, rounded at both ends, terminal, sometimes cylindric. — Hormosira 
Billardieri , Mont.; FI. N. Z. ii. 215. 
Var. y. Sieberi, Harvey, 1. c. p. 4. Frond short, fastigiate, dichotomous ; internodes 
obconic, truncate at the top, base truncate or tapering, terminal ovoid. — Hormosira Sieberi, 
Decaisne ; — FI. N. Z. 1. c. II. obconica, Kuetzing. 
Common aloug all the coasts on tidal rocks, between half and high-water marks, Banks 
and Solander, etc. (Australia, Tasmania.) 
11. SPLACHNIDIUM, Greville. 
Root a disk. Frond olive-green, cylindric, proliferously branched ; branches 
saccate, full of mucilage and branched filaments ; walls thin, membranous. 
Fruit dioecious. Conceptacles scattered over the whole frond, attached to 
the inner surface of its walls ; spores linear- oblong, subsessile ; peranemata 
simple. 
The following is the only species. 
1. S. rugosum, Grev. ; — FI. N. Z. ii. 215. Fronds 4-8 in. high; 
main axis stout, cylindric or clubshaped, | in. diameter ; branches sac-like, 
truncate, 1-2 in. long, surface covered with mamillse, each furnished with a 
pore that opens into the spore-cavity beneath. — J. Ag. Sp. Alg. i. 186; 
Harv. Ner. Austr. i. t. 14. 
Common on rocks near low-water mark from Auckland to Banks’s Peninsula, Lesson, etc. 
(Australia, S. Africa.) 
12. NOTHEIA, Bailly and Harvey. 
Frond olive-green, parasitic, filiform, irregularly branched, proliferous, 
solid, with distinct stem and branches, but no bladders or leaves. Concep- 
tacles scattered over the whole frond under the surface, containing linear- 
obovate spores and simple peranemata. 
A most curious plant, abounding on the Hormosira, and to all outward appearances a 
part of that plant. 
1. 1NT, anomala, Bailly and Harvey ; — FI. N. Z. ii. 216. t. 109 A. 
Fronds solitary, 3-8 in. long, growing from the conceptacles of Hormosira 
Banlcsii, excessively branched, bushy, cylindric ; branchiets narrow, spindle- 
