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30
Table of the Regions of Depth of the British Seas.
Littoral Zone.
The tract between tide
marks.
Characteristic Plants.
First Subregion.
Fucus canaliculatus.
Second Subregion.
Lichina. .
Third Subregion.
Fucus articulatus.
Fourth Subregion.
Fucus serratus.
IT.
Laminarian Zone.
Tract between low-water
mark and 15 fathoms.
III.
Region of Corallines.
15 to 50 fathoms.
IV.
Reg:on of deep Sea.
Corals.
50 fathoms to beyond 100.
Himanthalia lorea.
Subregio superior.
| Laminaria.
Rhodomenix,
Delesserix.
Subregio inferior.
Nullipora.
Characteristic Animals
Patella vulgata throughout.
First Subregion.
Littorina rudis.
Second Subregion.
Mytilus edulis.
Third Subregion.
Littorina littorea.
Purpura lapillus.
Fourth Subregion.
Littorina neritoides,
Trochi.
Trochus Ziziphinus.
Lacune,
Patella pellucida.
Patella caerulea.
Rissox.
Hydroid zoophytes throughout.
Subregio superior.
Fusus antiquus.
Pullastra virginea.
Pecten maximus.
Subregio inferior.
Pleurotoma teres.
Turbinolia milletiana.
Subregio superior.
Nezra.
Cellepor&.
Brachiopoda.
Ditrupa.
Subregio inferior.
Astrophuton.
Cidaris.
Oeulina.
Primnoa.
Som synes, har Forses äfven subregioner i sitt system.
han närmare utmäjslar dessa, framgår kanske bast af hans tabell
p: 373:
Hur
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