PREFACE. 



IX 



by no means thought to be limited to the statements 

 with which his name will be found to be connected ; 

 indeed, I owe him more than I can well express. 



I have been careful to acknowledge the source 

 whence the illustrations are taken, arid I have to 

 return my thanks to the Publication Committee of 

 the Zoological Society ; to Professor Flower, who 

 only add.ed one more to a number of acts of personal 

 kindness when he generously put at my disposal all 

 the wood-blocks which were in his own possession ; 

 and to those other friends who have allowed me to 

 copy figures from their works. 



As this manual is written on lines that are rarely 

 followed, I shall be greatly obliged for any suggestions 

 as to its improvement, or for corrections of any errors 

 which may have found their way into it. 



F. JEFFREY BELL. 



King's College , Mai/, 1885. 



