54 
BOTANY OF KERGUELEN ISLAND. 
Christmas Harbour, very abundant, Hooker. Common in Swain’s Bay, Boyal 
Sound, and near Vulcan Cove, Eaton. (General in the colder seas of both hemi- 
spheres.) 
2. Ceramium diaphanum, J. Ag. ; Flor. Antarct. 488. 
Christmas Harbom-, abundant. Hooker. (Cape of Good Hope and Atlantic 
coasts of Europe.) 
1. Ptilota Eatoni, Dickie in Jonrn. of Dot. v. 51, 1870; et in Joiirn. Linn. 
Soo. XV. 202. ; racbide filiformi 5-6-pollicari, pinnis oppositis insequalibus, una, 
luajore altornfl, minore, pinnulis pinnarum longiorum apices versus pectinatis, 
reliquiis bases harum versus, coeterisque omnibus subulatis ex serie articulorum 
magnorum subsimplici structis, spharosporis ad apices pinnularum subsolitariis, 
favellis torminalibus, ramis involucri 4-5 pectinatis conniventibus. 
Swain’s Bay, in 2 to 5 fathoms, on the side and end of a promontory and of an 
island about two miles from the entrance of the bay, exposed to the tide and a slight 
swell from the outer sea; very local. Usually parasitic upon .BaWia, sometimes 
attached to Mytilus ; Eaton. 
This species resembles T. Harveyi in the character of the involucre, but differs 
from it in general habit, and in the structure of the larger and smaller piinnules. It 
is also dissimilar in colour, being dull purple. 
Plate V., Fig. iii. : — 1, portion of frond of nat. size ; 2, portion of stem with 
young branch ; 3, apex of fully grown branch ; 4, ditto with sphaorospores ; 6, sphae- 
rospores ; all much enlarged. 
1. Ballia callitriclia, Ag. ; Dickie in Journ. Linn. Soc. xv. 46, 202 ; Farloio 
in Bull. E. S. Nat. Mus. 1876, 3, 31. Ballia Brunonis rar. 0 Hombroniana, Hook, 
f. and Harv., Flor. Antarct. 488. 
On Mytilus, roots of Maci'ocystis, and Annelid tubes, from tide pools down to 
0 fathoms ; very common in Christmas Harbour, Swain’s Bay, and Boyal Sound. 
(Falklands; Marion Island; Australia; Tasmania; New Zealand; Auckland 
Islands.) 
1. Callithamnion simile, Hook.f. and Harv., Flor. Antarct. 489; Dickie 
in Journ. Linn. Soc. xv. 202. 
Christmas Harbour, rare. Hooker. On Mytilus, Annelid tubes, and roots of 
Macrocystis, in 1 to 5 fathoms, in Observatory and Swain’s Bays ; frequent, Eaton. 
2. Callithamnion Ptilota, Hook. f. and Harv., Flor. Antarct. 489, t. 
clxxxix. 1 ; Farlow. in Bull. E. S. Nat. Mus. 3, 31. 
Boyal Sound, Kidder. (Crozets, Hooker.) 
3. Callithamnion Kothii, Lyngb. ; Dickie in Journ. Linn. Soc. xv. 203. 
In tide pools and at the extreme verge of low water, on Mytilus, in Swain’s and 
Observatory Bays, local, Eaton. (Atlantic shores from Greenland to Africa ; N.E. 
shores of the United States.) 
