CONTENTS
PAQE
V
ix
1
4
4
5
6
6
7
8
10
10
12
14
16
18
18
18
19
46
49
53
EDITOR’S NOTE
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ACKNOWLEDGEMENTS . . .. .. ..
I. Introduction . . .. .. .. ..
2. Definitions of Types of Symbioses ..
I. Symbiosis . . .. .. .. ..
A. Parasitism. . .. .. ..
B. Mutualism..
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C. Commensalism . . .. ..
D. Phoresis . . .. .. ..
11. Predation . . .. .. .. ..
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3. Significance of Understanding Sym bionts of Marine
Molluscs
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I. Importance to Shellfisheries . . .. .. ..
11. Importance t o Public Health . . .. .. ..
111. Importance to Biology . . ..
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4. An Analysis of the Factors Involved in Symbiosis . .
I. Host-Symbiont Contact
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A. Accidental Contact
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C. Contact Influenced by Chemotaxis
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D. Contact Influenced by Other Natural Taxes . . ..
E. Selectivity of Symbiont . . .. .. .. ..
F. Influence of Nature of Substrate
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B. Contact Dependent upon Hosts’ Feeding Mechanisms
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