COLLECTING INSECTS. 49 



there is a simple lung, as in the air-breathing snails. These, 

 with the cuttle-fishes, which we will not consider here, be- 

 long to a branch of the Animal Kingdom called Mollusca. 



CHAPTER VII. 



COLLECTING INSECTS. 



47. THESE lessons, as well as the preceding ones, are 

 prepared with the understanding that the pupils shall, so far 

 as possible, make a collection of the species of animals stud- 

 ied. In fact, it is a part of the lesson to know how and 

 where to collect, and above all to know how to preserve the 

 specimens collected. To enable the pupils to do this, the 

 briefest directions are given for the making of boxes, nets, 

 etc., accompanied with the simplest methods of preserving 

 the collections made. 



In many cases the directions given are by no means the 

 professional methods; thus the pupils are directed to use 

 common pins for insects, while the professional collector uses 

 only the true insect-pins made expressly for the purpose, but 

 these are oftentimes difficult to procure, and are more expen- 

 sive than the common ones. 



In commencing these lessons, each pupil must first be 

 provided with a number of common pins, and a box prop- 

 erly arranged in which to pin the insects collected. 



Some holiday afternoon, or an hour before school-time 



