from all who feel nn interest in the subject, such specimens of the
rarer British. Algae from all parts of the coast, as may serve to illus-
trate either some peculiarity of growth, or throw light on distribution,
or otherwise complete the history of the species. And 1
beg to assure such contributors, that it will always afford me
pleasm-e to acknowledge their assistance, answer their queries,
and communicate, in return, specimens which may be among
their desiderata.
W. H. 11.
Trinity College, DuMin,
Dec. 3rd, 1845.
A L I S T
OP THK
BRITI SH MARINE ALGrE
A R R A N G ED SY S T EM A T IC A L LY .
Several changes having been recently made in the distribution of the Algee into Families, the following
List is given for the use of those to whom these alterations may be unknown, for the purpose of enabling
them to arrange their coUectious in systematic order.
Species in which the native locality is doubtful, are marked with an asterisk (* ); those which are
doubtful as species and require further examination, arc marked with a cross (t).
Series 1.
Earn. 1. FUCEiE.
I. S a r g a s sdm .
* 1. vulgare, Ag.
* 2. bacciferum, Ag.
I I . Cy s t o s b ir a .
1. ericoides, Ag.
3. granulata, Ag.
* 3. barbata, Ag.
4. fceniculacea, Gtev.
5. fibrosa, Ag.
III. H a l id r y s .
1. siliquosa, Lyngh.
IV. P y c n o ph y c u s .
1. tuberculatus, Kg.
V. Fcous.
1. vesiculosus, L.
3. ceranoides, L.
3. serratus, L.
4. nodosus, L.
5. Mackaii, Turn.
6. canaliculatus, L.
VI. H im a n t h a l ia .
1. lorea, Lyngh.
m e l a n o s p e r m e a ;.
Fam. 2. LAMINARIEiE.
VII. A ia r ia .
1. esculenta, Grev.
VIII. L a m in a r ia .
1. digitata, Lx.
3. bulbosa, Lx.
3. sacobarina, Lx.
t 4. Fhiilitis, Lx.
5. fascia, Ag.
Fam. 3. SPOKOCHNOIDErE.
IX. D e sm a r e s t ia .
1. ligulata, Lx.
2. viridis, Lx.
3. aculeata, Lx.
X. S p o r o c h n u s .
1. pedunculatus, Ag.
XI. C a r p o m it r a .
* 1. Cabrerm, Kg.
XII. A r t h k o c l a d ia .
1. viUosa, Duby.