MARINE BIOLOGY AT SKIPPER'S ISLAND 253
"gribble", Limnoria lignorum (Rathke), the last having almost
removed all wood from the piles of the dam.
The two cirripedes, Balanus balanoides (L.) and Elminius
modestus Darwin, are present but the latter dominates the
habitat, covering stones, piles and seaweed.
Three tunicates have been found, all in fair quantity.
Ascidiella aspersa (O. F. Muller) on the piles and, on the fucoids,
the "golden stars" sea squirt Botryllus schlosseri (Pallas) and the
pink and less regular Botrylloides leachii (Savigny).
The following fish have been netted from the dam or in its
vicinity. Numbers of a small goby, Gobius microps Kroyer; and
single specimens of the following: the "father lasher", Cottus
bubalis Euphrasen; a small specimen of the "Great Pipe-fish",
Syngnathus acus L.; the "butterfish", Pholis gunnellus (L.); a
very small flounder, Platichthys flesus (L.); and a large vivipar-
ous blenny, Zoarces viviparus L.
There are many gaps in this record. No doubt some will be
filled by repeated visits to the island. However, this small site
must be treated with care. So far as we know at present there is
no other habitat quite like the dam within our area.
Acknowledgments
My thanks are due, as indeed are those of all our Recorders,
to our President and owner of the island, Mr. E. F. Williams,
F.R.E.S., F.Z.S. He has given us the freedom of the island,
supplied the food and often the transport necessary for this
investigation.
Thanks are also due to Prof. J. McCunn, F.R.C.S., Dept. of
Anatomy, Royal Veterinary College, London, for the use of
Departmental facilities in the furtherance of this investigation.
Reference
Stephenson, T. A. (1935). The British Sea Anemones. Ray Society,
London, Volume II, p. 195; text-figure 78: and Plate XXII,
figure 3.