GAMMARUS MARINUS. 
373 
very gregarious, one or two may be seen entirely of a 
buff colour. 
They live amongst the seaweed, and are commonly 
found, when the tide is out, to abound far up in estuaries 
and beneath such of the weed as is below high-water 
mark, forming a band around the coast-line probably of 
all southern and western Europe. 
Dr. Leach’s specimens of this species in the British 
Museum are from the coast of south Devon. We have 
found it very abundantly at Plymouth. Dr. Walker has 
found it rather common from the mouth of the Mersey 
to the River Dee. The Rev. Mr. Norman and Mr. Jeffreys 
have taken it in the Outer Skerries Harbour, Shetlands. 
Mr. W. Thompson records it from the River Ban, 
Kilrea, Strangford Lock, Ballysodare, co. Sligo, and 
Loch Neagh, in Ireland. The specimen described and 
figured by M. Milne Edwards, under the name of G. 
Olivii, was found by him abundantly on the coast of 
Naples ; and that which he described as G. offinis , having 
the first pair of hands much larger than the second, he took 
on the coast of La Manche. The specimen that Rathke 
described under the name of G. gracilis he procured 
abundantly at Cape Parthenon, in the Crimea ; whilst 
G. Kroyeri and pmcilurus he obtained at Christiansund, 
Molde, Drontheim, Namoen fiord, and Nitika ; and 
Liljeborg has procured it on the eastern coast of Sweden. 
We can discover no character sufficient to distinguish 
these from Leach’s specimens. 
The figure given by Rathke of G. pcecilurus has the 
palm of the hands drawn as serrated, which is not the 
case in G. Kroyeri . This character is not noticed in the 
author’s description, and both Liljeborg and Bruzelius 
consider the two to be one and the same species. 
