div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imagea href=https:reader042vdocumentsmxreader042viewer2022020523575068331a28ab0f07af0e6ahtml5page1jpg target=_blank img data-url=a-biochemical-factor-in-the-zonation-of-marine-molluscshtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: A Biochemical Factor in the Zonation of Marine Molluscs loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader042vdocumentsmxreader042viewer2022020523575068331a28ab0f07af0e6ahtml5thumbnails1jpg width=140 height=200 adivp© 1966 Nature Publishing Grouppdiv