PREFACE 



THE plan of the present volume is built much on the 

 same lines as those of the two preceding ones, though 

 we have made one or two alterations which appeared 

 to us, if not necessary, at least an improvement on these. 

 Thus, instead of giving a list of all the species included 

 in the British Fauna, we have only given those about 

 which we had any information, by these means doing 

 away with a good deal of unnecessary matter. 



We have been aided in our work by many able and 

 willing correspondents, who have spared themselves no 

 trouble in answering our numerous inquiries, besides 

 helping us in any other way in their power. On the 

 Mainland we are indebted to Mr. Cursiter for access to 

 his valuable library, and for the trouble he has taken in 

 looking up and pointing out to us any passages that 

 he thought would be of use in furthering our work. 

 Mr. Cursiter is a well-known authority on Orcadian and 

 Shetland antiquities, which are his special study, and 



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