65 
the British Marine Algae. 
development. In cases where the reproductive organs are of 
a higher type, and the vegetative organs of a very simple 
structure, as in Vancheria , the plant will rank higher than one 
in which the vegetative system is highly developed, and the 
reproductive system very slightly so, as in Desmarestia and 
Laminaria. A preliminary attempt to give the distribution 
of species in the British Islands has been made, founded on 
published records, or on species seen by ourselves in herbaria. 
As it is desirable to indicate the part of the British Islands in 
which each species occurs, we have divided the British coasts 
into fourteen sections, which are as follows : — 
1. From the Shetland Islands to the Sound of Mull. 
2 . From the Sound of Mull to the Solway Firth. 
3. From the Shetland Islands to Aberdeen. 
4. From Aberdeen to the Tweed. 
5. From Solway Firth to Holyhead. 
6. From Holyhead to the Scilly Islands. 
7. From the Tweed to Cromer. 
8. From Cromer to Dover. 
9. From the Scilly Islands to Dover. 
Ireland. 
10. From Malin Head to Roundstone Bay. 
11. From Roundstone Bay to Bantry Bay. 
12. From Malin Head to Dublin Bay. 
13. From Dublin Bay to Wexford Harbour. 
14. From Bantry Bay to Wexford Harbour. 
In each case the locality first-named will be included in 
that section, but the second will not, the second locality being 
the starting-point for the next section. Where a general 
record without localities has been published, the initial letter 
of the country only will be given, thus — E. S. I. When 
a specimen for the district has been seen by us, it is indicated 
by a note of exclamation following the number. It is hoped 
that a foundation may thus be laid for working out the dis- 
tribution of Marine Algae on our shores, this branch of the 
subject having as yet received too little attention. 
F 
