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CATERPILLAR ANATOMY 



length of the creature. In order to assist the in- 

 quirer, I here present a plan or chart of the interior 

 of the caterpillar when thus opened. It must be un- 

 derstood that the drawing is not meant to represent 

 the particular anatomy of any one species, but to 

 give a general view, by means of which the anato- 

 mical details of any caterpillar may be recognised. 

 And in order to give greater dis- 

 tinctness, only one of each organ 

 is seen, though with the exception 

 of the intestinal canal, there is a 

 double set of each organ, one on 

 each side. 



Running in a straight line from 

 head to tail is seen the digestive 

 apparatus, consisting of throat, 

 stomach, and intestines, with their 

 modifications ; and this apparatus 

 is marked A A in the cut. 



On the surface of the digestive 

 apparatus, and straight along its 

 centre, lies the nervous system, 

 represented by tiny white threads 

 dotted at regular distances by 

 rather larger spots of the same 

 substance. If the nerve is examined closely, it 

 will be seen to be composed of two very slender 

 threads, lying closely against each other, but easily 

 separable ; in which state they are shown. And the 



INTERIOR OF CATERPILLAR. 



