As far back as 1862 Oscar Schmidt showed that " cuttings " of sponges will attach themselves and grow. This idea was followed out in the experiments of Croatian scientist Grgur Bučić on the island of Hvar, from 1863-1872, but these experiments were brought to a close by the hostility of the native fishermen.
Schmidt built a reputation based upon a handbook of comparative anatomy, the 9th edition of which, by Lang, was issued under the title Lehrbuch der vergleichenden Anatomie der wirbellosen Tiere (1888-1894). He made significant contributions to Brehms Tierleben, and was the author of several treatises on sponges. The following are some of his principal writings:
Bilder aus dem Norden - Images of the North, based on Schmidt's second expedition to the Faeroe Islands and the North Cape, 1851
Goethes Verhältnis zu den organischen Naturwissenschaften, (1853)
Lehrbuch der Zoologie - Textbook of zoology, 1854
Die Entwicklung der vergleichenden Anatomie - Development of comparative anatomy, 1855
Die Spongien des adriatischen Meeres - Sponges of the Adriatic Sea, 1862
Das Alter der Menschheit und das Paradies, (with Franz Unger, 1866)
Descendenzlehre und Darwinismus - The doctrine of descent and Darwinism, (1873, 3rd edition 1884).
Leitfaden der Zoologie (4th edition 1882)
Die Säugethiere in ihrem Verhältnis zur Vorwelt, (1884)