Vlll PREFACE. 



My object in the following pages is to give a 

 catalogue of all the species I have observed in the 

 Isle of Man and the neighbouring sea, with their 

 synonyms and remarks, critical or descriptive, in 

 such cases as may appear necessary or useful. 

 Wherever I am acquainted with the animal (it not 

 having been noticed before), I have given such 

 information as I possess on the subject ; even 

 though in many cases that information be limited 

 to noting the colour only : every note on a molluscous 

 animal, in the present state of the science, having a 

 certain value. The synonyms are given, because 

 they are not fully given in British works on these 

 animals : but for that reason, except when abso- 

 lutely necessary to elucidate some particular species, 

 I conceive they have no business in a provincial 

 Fauna or Flora, serving only uselessly to swell the 

 book. The same remark applies to superfluous 

 descriptions. 



In the arrangement, I have followed in general 

 Rang's Manuel ; not because I look upon that 

 arrangement as complete, but because the Fauna of 

 a small district, such as the Isle of Man, is too 



