194 
HISTORY OE BRITISH CRUSTACEA. 
Gordon). Dr. Johnston* - remarks that, “in summer it 
crawls about the muddy shores ; but in autumn and winter 
it lurks in cylindrical holes which it makes in the clay near 
high-water mark. These holes exactly resemble those that are 
made by a worm ; they are about two inches in depth, per- 
pendicular to the surface, and nearly parallel to each other. 
As great numbers are bored close together, the clay appears 
as thoroughly drilled as does a piece of wood that has been 
eaten with the maggot of the wood-beetles.” 
The habits of the Corop/dum longicorne have been studied 
by M. D’Orbigny, of Rochelle, t who observed them in the 
Bay of I/Aiguillon, near that place, where they are called 
Pernys. During the winter he believes that they retire to 
the deep sea, as they do not begin to appear till the month 
of May, when they are found living in holes in the mud, 
and disappear at the end of September. The roughness of 
the waves causes the sand and shingle of shallow parts of 
the bay to collect in elevated ridges ; the depressions between 
these and the ridges are tenanted by various Annelids of 
the genera Nereis , Amphinome , Arenicola , etc., which, when 
the sea comes up, show themselves at the holes of their 
* History of Berwickshire Naturalists 5 Club, 1842-1849, p. 78. 
f Letter to Latreille, Enc. Meth. x. 164, 165 ( Podocere ). 
