IV PREFACE. 



would call the attention of writers for our publications to the 

 desirability of appending the name of the author to every species 

 mentioned, and also to every genus mentioned separately, not only 

 to facilitate reference, but as a check upon misprints and errors. A 

 large number of casual errors have been corrected in tbe Index ; 

 and in the more serious cases an explanatory note has been added. 



A few omissions and corrections, which escaped notice during 

 the passage of the Index through tlie press, will be found at the end 

 of the volume, on page 437. 



G. B. HOWES, &c. i. >S. 



Burlington House, 

 Feb. 11,1896. 



