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<p><span style="color: rgb(33, 37, 41); font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"; letter-spacing: 0.7px; text-align: justify;">Naturally, attention is focused mainly on the nature of hard parts belonging to each group of invertebrates represented among fossils.Invertebrate Fossils is a book intended to supplement instruction in the classroom and laboratory by providing a fairly complete description of each main group of fossil invertebrates, with illustrations of examples. It is planned as a textbook, not as a reference work. This means that the chapters undertake to explain in consecutive manner important features of structure, classification, reproduction and growth stages, characters of main divisions, evolutionary trends, and geological distribution. Condensed summaries of morphological features are given in illustrated form, accompanied by brief cross-indexed definitions of terms. Stratigraphical distribution is represented graphically, and in most chapters there are supplementary illustrations in which fossils are grouped by geologic systems.</span><br></p>
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