SAMUELSON, ON HUMBLE CREATURES. 59 
ficial or inexact. He has obviously and successfully endea- 
voured to make himself acquainted, both by direct observation 
and by reference to the best and most recent authorities, with 
the subjects upon which he treats. As might be expected, 
the account of the fly, which occupies about two thirds of the 
volume, is more lively and interesting to the general reader 
than that of the worm, and in this part of his work he has 
received considerable assistance from the pen and pencil of 
Dr. Hicks, whose name is well known as a most careful and 
skilful microscopic observer of many points in the structure 
of some parts in various insects, by papers published in the 
‘Proceedings and Transactions of the Linnean Society.’ 
We can strongly recommend Mr. Samuelson’s work to all 
young naturalists, and more especially will those who employ 
the microscope in the investigation of the structure of insects, 
find in it many novel and interesting observations. 

