@book{bhlitem44528, title = {Studies in evolution; mainly reprints of occasional papers selected from the publications of the Laboratory of invertebrate paleontology, Peabody Museum, Yale University }, copyright = {Public domain. The BHL considers that this work is no longer under copyright protection.}, url = {https://www.biodiversitylibrary.org/item/44528}, note = {https://www.biodiversitylibrary.org/bibliography/11889}, publisher = {New York, C. Scribner, 1901}, author = {Beecher, Charles Emerson,}, year = {}, pages = {676}, keywords = {Brachiopoda|Brachiopoda, Fossil|Evolution|Spines (Zoology)|Trilobites|}, }