12fi C^anon A. M. Norman on Brlfish Amphipoda. value of tliese experiments we liope will prove to be very great both directly and indirectly, and open up an immense tield of crystallography in its relation to oils, fats, and waxes. It has also naturally occurred to us that the formation of certain intricate structures by other insects may be also more or loss directly due to crystalline or pseudo-crystalline lormation *. ^IV. — British Amphipoda of the Tribe Hyperiidea and the Families Orchestiidaj and some Lysianassidi^. By Canon Norman, M.A., D.C.L., LL.D., F.U.S., &c. I PUEroSE in these notes to revise the species of British Amphipoda, and at the same time give an account of the Amphipoda procured during the North Atlantic Expeditions of the ' Porcupine,' ' Valorous,' ' Knight Errant,' and ' Triton.' The records of the larger number of the captures of these expeditions will fall under the British sj)ecies, but in those instances where the species are not members of our fauna, that which relates to them will be enclosed in brackets. The study of this group of Crustacea has been beset with difficulty, and in consequence of inadequate descriptions and illustrations old records of species must, in some instances, be received with caution. The publication of the splendid work of Professor G. 0. Sars has supplied the student with most perfect descriptions and illuatrations of the Amphipoda of Norway, which include by far the greater part of those known in our own fauna. If the critic is sometimes inclined to think that occasionally there are to be found in that work divergences described as specitic which he would rather regard as varietal, after all it is a mere matter of opinion, and tiie author has at any rate directed our attention to modifica-tions of character which are worthy of study. In Sars's work we recognize a standard authority, and the arrangement there set forth will here be followed. I have only given references to such authors and papers as especially throw light upon the species and their more im-portant synonymy. By way of shortening the references to the most frequently quoted authors, the following numbers will be employed. In those cases where the work was included in the list of works and papers on Isopoda lately given by me in the 'â– Annals ' in my paper on " British Isopoda Chelifera" • The cells of wasps, though hexagonal, have not the prismatic base of the bee-cell. Analysis shows that thej contain typical wax crystals.
BioStor
