ECOLOGICAL STUDIES IN SOUTH BENFLEET CREEK 297
Distribution
Mud-dwelling fauna
I am very much indebted to Mr. G. I. Crawford for confirming
my identification of the two species of Corophium found in the
Creek. In his letter to me he writes: —"I have no doubt that the
specimens from area G are C. volutator and that the specimens
from areas A, B, E and F are the same as what I called C.
arenarium in my 1937 paper. I express it in this cautious way,
because in that paper I left the validity of the 'specific' dis-
tinctions unresolved .... I believe, however, that C. arenarium
is now generally accepted as a good species, but all I can say is
that I am satisfied that your specimens are the same species
(sub-species or form) as the material on which I named and
described C. arenarium".
TABLE IV
The distribution of Nereis diversicolor Arenicola marina, Sabellidae
tubes, Scrobicularia plana, Paludestrina stagnalis, Corophium arenarium
and Corophium volutator.
P denotes they are present.