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National Museum. Mr James G. Swan, of Port Townsend, Wash. Terr., has sent a fine assortment of dried hydroids, corallines, and barnacles from Cape Flattery, and the Museum of Comparative Zoology has added three rare species of crayfishes to our already large and carefully prepared collection of that group. These species are as follows: Astacus pallipes Lereb. from Switzerland, Cambarus cubensis Erich, from Cuba; and Cambarus Putnami Fax., from Kentucky.

One of the most important additions to the department has been obtained from the Rev A. M. Norman, of England, in exchange. It consists of 268 microscopic mountings of the spicules and sections of British sponges contained in the collection of Mr Norman. The number of species represented is 189. Mr. Norman states that the mountings were made exclusively from specimens determined by the late Dr. Bowerbank, and in many instances they are from the type, which is