SINCE the foundation of the Zoological Station at Naples, nearly one hundred naturalists have worked in the laboratory connected with it, and a goodly number of papers, which have resulted from their labours, are scattered through the biological periodicals of almost all the civilised nations of Europe. Gratifying as this success must be to Dr. Dohrn, the founder of the institution, he does not show himself inclined to repose on his laurels, but aims at still further extending the scope of the station by starting two publications in connection with it. One of these, of which we have the first number before us, is published in octavo size, and, as we learn from the preface, is intended for smaller papers, and general notes on the habits of animals living in the Aquarium, and other zoological topics. It will, moreover, be the medium for recording the systematic observations now being carried on by the permanent staff at the station. The second publication will be in quarto size, and will bear the title “Fauna u. Flora des Gulfes von Neapel und der angrenzenden Meeresbezirke.” As its name indicates it will consist of fully illustrated monographs of the various groups of animals found in the Bay of Naples or adjoining seas. The parts may be purchased separately, or may be subscribed for by the payment of 1l. yearly. The contents of the first part of the “Mittheilungen” promise very well. Dr. Schmidt-lein, who manages the public aquarium, contributes three short papers. One of them gives an interesting account of the habits of a large number of the various animal forms living in the aquarium. A second deals with the periodic appearances of pelagic animals in the Bay of Naples during the two past years, and the third is a list of the breeding times of the marine forms inhabiting the Neapolitan seas. Dr. Hugo Eisig, the general manager of the station contributes a paper of very great importance on the segmental organs of the Capitellidæ. He shows that, in some species of this group, it is normal for several segmental organs to be present in a single segment, and that the number of these organs present in a segment increases in passing from before backwards. Dr. Eisig compares the segmental organs in Annelids with the segmental tubes in Vertebrata, and points out how closely the arrangement he has found in the Capitellidæ agrees with that described by Dr. Spengel in some Amphibia. There is an illustrated paper by Dr. Meyer on some points of crustacean anatomy, and two botanical papers by Drs. Falkenberg and Smitz. Dr. Dohrn himself communicates some observations on the Pycnogonidæ, in which he adduces a large amount of evidence to prove that the view as to the number of their appendages put forward by him some years ago, which was subsequently attacked by Semper, is, in all essential points, correct. Mittheilungen aus der zoologischen Station zu Neapel, zugleich ein Reperatorium für Mittelmeerkunde. Erste Band, I. Heft. (Leipzig: 1878.)