. Animals of the seashore. Marine animals -- Atlantic Coast. 142 ANIMALS OF THE SEASHOBE June and along the southern Atlantic or Gulf Coast, it may occur as early as March. The embryo produced by the spawning is a minute ( mm.) spherical body. It is able to move over the surface of the water by means of its small hair line cilia or swimming organs. This free swimming stage may last two or three weeks. However it soon wearies of a free swimming exist- ence and falls down through the water and "sets'' or attaches itself to the substratum. If the young oyster happens to fall on something
. Animals of the seashore. Marine animals -- Atlantic Coast. 142 ANIMALS OF THE SEASHOBE June and along the southern Atlantic or Gulf Coast, it may occur as early as March. The embryo produced by the spawning is a minute ( mm.) spherical body. It is able to move over the surface of the water by means of its small hair line cilia or swimming organs. This free swimming stage may last two or three weeks. However it soon wearies of a free swimming exist- ence and falls down through the water and "sets'' or attaches itself to the substratum. If the young oyster happens to fall on something hard, it will immediately attach itself, and lose forever its cilia. On the other hand, if it falls on something- soft, such as mud, it will be unable to set, and will consequently soon die. It is therefore to the great. Fig. 23 Oyster shells, Bivalve, N. J. interest of the oystermen, that the young oyster find something hard when it begins to set. It is. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Richards, Horace Gardiner, 1906-. Boston, B. Humphries, inc
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