Aldrich, Thomas Bailey, 1836-1907 · Boston, CT : Hall and Locke · leaf 238
,which bud outone from theother, and man-ufacture thesupporting skeleton we know as the sponge of com*merce itself. Under the microscope, these livingsponge-units appear in various guises and shapes.Some of them are formless, and, as to shape, ever-altering masses, resembling that familiar… … Development of a Sponge (Olynthus).The egg. 2, 3, and 4. The process of egg-division. 5 and 6. The gastrula-stage. 7. Theperfect sponge. 208 Wonders of Earth, Sea, and Sky they seize food and flourish and grow; and they prob-ably also give origin to the eggs from which newsponges are in due course…
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