INTRODUCTION. 



1905. Sept.: A few clays in S.E. Devon for Freshwater 

 Entomostraca. 



This volume on the Crustacea of Devon and Cornwall is 

 the joint work of the authors ; but Dr. Scott has been 

 primarily responsible for the account of the Freeliving 

 Oopepoda, and Dr. Norman for the remainder of the 

 Crustacea. 



The authors are greatly indebted to Mr. Andrew Scott, 

 Dr. Scott's son, for the beautiful drawings of the Copepoda. 

 The colotype plates of these are very satisfactory inasmuch 

 as every minute detail of the artist's work is accurately 

 reproduced. The first nine plates by Mr. E. Popple are, 

 however, not quite so good, although the drawings were all 

 that could be desired. These nine plates were photographed 

 from pencil drawings, and not being wholly satisfactory 

 Mr. A. Scott, taught by this experience, went over all his 

 figures with Indian-ink, and the result, as will be seen, has 

 been excellent. 



In the following Catalogue, when a name follows a locality, 

 it must be understood that the authority is the owner of that 

 name, and not the authors; but when the name is followed 

 by an ! (e. g. " R. Vallentin ! ") it is implied that the 

 authors are responsible for the identification. When alter 

 the name a reference is given (e.g. " Garstang, iii. p. 221"), 

 such reference is in all cases to volume and page of " The 

 Journal of the Marine Biological Association of the United 

 Kingdom." 



The references given have been in most cases restricted 

 to works easily accessible to an English naturalist with a 

 small library ; but in some cases they have been somewhat 

 more extended for special reasons. 



The following Tables will indicate certain points in the 

 distribution of species ; and these are followed by a list ot 

 publications in which descriptions or habitats of Crustacea 

 from Devon and Cornwall mav be found. 



