THE MICROSCOPE 



DECEIVCBER, 1896. 



Number 48 



New Series 



Objects Seen Under the Microscope. 



By chrysanthemum. 



XXXVI. — The Cockroach {Concluded). 



Passing from the complex arrangement of jaw append- 

 ages, consider the parts of the alimentary canal. To see 

 these, the cockroach must be dried (with blotting paper) 

 and its under surfuce imbedded in paraffin. The hard 

 and soft wings must be removed, the terga or hard dorsal 



sclerites cut through longitudinally on each side, and 

 removed, care being taken not to injure the heart, lying 

 immediately beneath them in the middle line of the back. 

 Fig. 6 will now be of great use. It shows a dissection 

 of the male cockroach looked at from the right side. 



The three well known regions — fore, mid and hind 

 intestine are present — but the first and third differ 

 essentially from the second aa. to. origin. Both of them 



