THIS volume of Dr. Lang's text-book treats of the Mollusca, Echinodermata, and Enteropneusta. To the first group of animals 283 pages are devoted, and to the latter two 319. The complete and ...
IN 1861 a plan was drawn up in Germany to provide a series of hand-books or text-books on botany, which should treat of the science as it existed at the time; four of these books were completed, De ...
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