126 Canon A. M. Norman o)i British Amphipoda. 



value of these experiments we hope 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 less directly due to crystalline or pseudo-crystalline 

 formation *. 



XIV. — British Amphipoda of the Tribe Hyperiidea and the 

 Families Orchestiidaj and some Lysianassida3. By Canon 

 Norman, M.A., D.C.L., LL.D., F.R.S., &c. 



I PURPOSE in these notes to revise the species of British 

 Amphipodaj and at the same time give an account of the 

 Amphipoda procured during tiie 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 species, 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 illustrations 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 specific which he would riither 

 regard as varietal, after all it is a mere matter of opinion, and 

 the 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. Qy 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 ' Annals ' in my paper on " British Isopoda Chelifera" 



* The cells of wasps, thoiigli hexagonal, have not the prismatic base 

 of the bee-ceU. Analysis shows that thej contain typical wax crystals. 



