266
THE ESSEX NATURALIST
Acknowledgments
I am particularly grateful to Dr. Anna B. Hastings for her
advice, encouragement and criticism from the inception of this
work to its completion. I would also like to thank Dr. Daphne
Atkins, of the Marine Laboratory, Plymouth; the Director and
staff of the Ministry of Agriculture and Fisheries Laboratory,
Burnham-on-Crouch, especially Mr. G. Duncan Waugh; and Mr.
S. L. Stammwitz, of the Exhibition Section, British Museum
(Natural History), for their help and advice; and Dr. A. Anders-
sen, Naturhistoriska Riksmuseet, Stockholm, for the loan of
specimens. Finally, I am indebted to Dr. J. P. Harding for his
criticisms and suggestions.
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