4 T 4 
TRANSFORM A TIONS OF INSECTS. 
fibre which keeps the tubes open is found in both. The true insects 
resemble the Myriapods in their vascular system, and in their 
nervous system also. The nervous system of the Myriapoda , 
as in all the A rticulata, exhibits a double series of ganglia, con- 
nected by cords of intercommunication. The ganglia above the 
oesophagus in the Myriapods is situated within the head, and 
corresponds with the structure as seen in the larvae of insects. 
Scolopendra morsitans. 
The ganglia of the nervous chain which runs down the body, as in 
insects, are numerous, in proportion to the number of segments ; 
and they are well developed in Scolopendra , whose legs are 
long and powerful, and but feebly so in jfulus , whose locomotive 
organs are small and weak. The organs of the senses of the 
Myriapoda resemble those of insect larvae, but the most perfect 
Scolopendra does not present the complicated compound eye which 
characterises the perfect butterfly or beetle. 
Wings are never met with amongst the class now under con- 
