Ill
bulbosis bulbo oblongo solido sursum filiformibus alterne decompositis, secuudariis ramulisque quaquaversis
sparsis obtusis basi attenuatis.
H a b . East coast, Gunn. Derwent, Oldjield.
Frond 8-4 inches liigh, branched from the base. Prmaitj branches numerous, each of them swelling at base
into an oblong, solid bulb, from of an inch long and 1-2 lines in diameter. Beyond the bulb the branches are
filiform, twice as thick as hog’s-bristle, and alternately decompound, the latei-al branches directed to all sides. Secondary
branches vii-gate, simple, having a few scattered ramuli, which are obtuse at the apex and much attenuated
to the insertion.
Dried specimens do uot readily recover their form on being rcmoistcned, and we arc uot quite certain as to
the internal structure of the frond. There is some appearauce of internal septa at short inten-als, and this character,
added to the form of the ramnli, has induced us to place this curious plant provisionally in Chondria. Until fruit
shall have been found, its place in the system caunot be finally ascertained. The habit is that of a Rhabdonia.
6 . C h o n d ria fu s ifo lia (Hook. fil. et Harv.).—Laurencia fusifolia. Hook. fil. et H a n . in Lond.
Journ. vi. p . 401.
H a b . Sullivan’s Cove, Dr. Lyall.
Gen. XLYII. EYTIPHLOEA, Ag.
(Ag. Sp. Alg. ii. p. 50. Haiv. Ner. Austr. p. 31. Kiitz. Sp. Alg. p. 844.)
1. R y tîp h loe a s im p lic ifo lia (Harv.) ; fronde foliácea costata a costa repetite prolifera et demum
spurie ramosissima, foliis linearibus planis v. subcanaliculatis costa tenui percursis opacis tenuissime trans-
versim striatis obtusis basi in petiolo attenuatis, stichidiis linearibus involutis fasciculatis e costa enatis.—
Harv. Alg. Austr. Exsic. n. 133.
H a b . Tasmania, rare, R . Gunn.
D is t r ib . South coast of AustraUa, rare, W. H. E .
Primary leaf from an inch to 3 or 4 iuches long or more, from 1-2 lines wide, quite flat, and traversed by a
slender midrib, from which numerous similar leaves, 1-3 inches long, are thrown out proliferously, without any
definite order. These in like manner bear a third, and those a fourth series of similar- leaves, until there results a
bushy, much compounded frond, composed of simple leaflets. All the leaflets are linear, obtuse, tapering to the
base into an imperfect petiole, and are of a closely-cellular substance, rather opaque, and very finely striate transversely.
The colour is a dull deep-red. Stichidia tufted, linear, issuing from the midi-ibs.
In habit tliis plant resembles a very narrow form of Lenormandia spectabilis, but is of much closer ceilidar
substance, and tbe reticulations ai-e not diagonal, as in all the species of Lenormandia. Perhaps it would range
better in Dictymenia than in Ryliphloea.
2. R y tip h loe a a u s tr a lis (Endl. 3rd Suppl. p. 48 ; Mont. El. Canar. p. 154, in not.).—R. austral-
asica, Earv. Ner. Austr. p . 3 2 ; Swan Riv. Alg. n. 65. p . 538 ; Alg. Exsic. Austr. n. 134; Phyc. Austr.
i. 27.
H a b . Southport, C. Sluart.
D is t r ib . Common on the western and southern coasts o f Australia.
Gen. X LV III. BOSTRYCHIA, Mont.
(Mont. Hist. Cub. Bot. p. 39. Harv. Phyc. Brit. t. 48. Ner. Austr. p. 58. Kütz, Sp. p. 839.)
1. B o s try c iiia m ix ta (Hook. fil. et Harv.; Lond. Journ. iv. p. 2 7 0 ; Harv. Ner. Austr. p. 7 0 ; El.
N. Zeal. ii. p. 225; Harv. Alg. Exsic. n. 141).
H a b . On stones, above half-tide. Port Arthur, IF. E . E .
D i s t r ib . New Zealand and Cape of Good Hope.
2 . B o stry ch ia d ista n s? (Ilarv. in Fl. N. Zeal. ii. p. 2 2 6 ) .
H a b . In the Derwent, at New Norfolk, Gunn. Rivers in New Zealand.
If tliis be not identical with the New Zealand species found in similar localities, it is at least nearly allied to
it. Our specimens are not in good order.
3. B o stry chia H a rv e y i (Mont. Fl. Chil. Cell. Ü. p. 307. t. 16. f. 4 ; Hook. F l N. Zeal, ii.p . 225).
H a b . Tasmania, C. Stuart.
D i s t r ib . A native of Chiloe and of New Zealand. Closely allied to the B . scorpioides of Europe,
but more slender.
Gen. XLIX. POLYZONIA, Suhr.
(Suhr ill Flora, 1 8 3 4 , p. 7 3 9 . Harv. Ner. Austr. p. 7 0 . Kütz. Sp. Alg. p. 88 1 .)
1. P o ly zon ia in c isa (J. Ag. in Linn. xv. p. 2 4 ; Harv, Ner. Austr. p. 71).
H a b . Parasitical ou various Algce.
Gen. L. POLYSIPHONTA, Grev.
(Grev. Fl. Edin. p. 3 0 8 . Harv. Ner. Austr. p. 3 7 . Kütz. Sp. Alg. p. 8 0 2 .)
Su b g en u s 1. OLIGOSIPHONIA, J. Ag.
1. P o ly siph ouia H o o k e r i (Ilarv. Ner. Aust. p. 40. t. 12).—P. acanthophora, Earv. in Lond.
Journ. Bot. iii. p . 441.
H a b . Georgetown, abundaut.
2 . P o ly siph onia Mallardiæ (Harv. Ner. Austr. p. 40. t. 13).
H a b . Georgetown. Coast of New Holland.
8 . P o ly siph onia H y s tr ix (Hook. fil. et Ila rv .; Harv. Ner. Austr. p. 41. t. 14).
H a b . Georgetown, etc. Coast of New Holland.
4. P o ly siph onia breviarticulata (J. Ag. Alg. Medit. p. 135; Harv. iu Ner. Bor. Amer. ii.
p. 36. t. 16 h. ; Trans. R. I. Acad. xxii. p. 539).
H a b . Piper’s River, R. Gunn. Native of Europe and North America.
5. P o ly sip h on ia ab scissa (Hook. fil. et Harv.; Fl. N. Zeal. ii. p. 227).—P. abscissa and P . mi-
crocarpa, Fl. Ant. et Earv. Ner. Austr.
H a b . Georgetown, R. Gunn, JF. Archer. Native of Antarctic Sea and New Zeaiaud.
The Tasmanian specimens are larger and somewhat coai-ser aud duller in colour than those from the Antarctic
Sea, but the differences do not seem to warrant their specific separation, The species represents P. formosa
and P. ureeolata m the Southern Ocean, and is probably as variable as those forms are well known to be.
6 . Polysiph onia mollis (Hook. fil. et Harv.; Harv. Ner. Austr. p. 43).
H a b . Georgetown, on Zostera; common. Soutli coast of New Holland.
7. Polysiph onia crassiu scu la j fuscescens, cartilagineo-succosa, siccitate subrigida, rugosa, fronde
ultrasetacea sursum maxime attenuata pluries dichotoma, axillis patentibus, ramis minoribus irregulariter
dichotomis nudis v. ramulis paucis lateralibus plus minus obsitis, axi tetrasiphonio, articulis superioribus
diametro æquaUbus v. sublougioribus ecorticatis, inferioribus diametro brevioribus plus minus dense
corticatis.