52 HALF-HOURS IN THE GREEN LANES. 



segments, four of which encase the head and thorax 

 in such a manner that no division is perceptible 

 between these two parts of the body. The re- 

 mainder of the segments are devoted to the pro- 

 tection of the abdomen, &c. This horny shell- 

 covering answers a double purpose. It protects the 

 soft and seemingly gelatinous body from injury, and 

 also serves as an external skeleton for the attach- 

 ment of the various muscles and articulations. It is 



Fig. 47. Fig. 48. Fig. 49. 



Antenna of Young of 

 Cyclops quadri- Cyclops. Cyclops quadricornis 



cornis. (female). 



in the first and largest of the segments of the 

 armour that the solitary eye is placed, which has 

 earned for the creature the name of Cyclops. The 

 antennae are double, and are placed on either side 

 the eye; hence the specific name of quadricornis. 

 In the female, the largest pair of antennas are longer 

 and more tapering than in the male, and are as 



