148 



LIFE, IN ITS INTERMEDIATE FORMS. 



phosis. They rather consist of a progressive increase of 

 the number of limbs, and of segments. At birth, the 

 Julus is destitute of limbs, which do not appear till after 

 the first moult. Three pairs are now developed, and with 

 these the little creature must be content until the second 

 moult, after which it possesses seven pairs. These are 

 placed on the foremost segments, the posterior rings 

 being, as yet, destitute of limbs. The third moult occurs 

 when the animal is a month old ; it has now twenty-two 

 segments, and twenty-six pairs of feet. Thirty-six pairs of 

 feet signalise the fourth moult ; and after the fifth, there 

 are forty-three pairs, and thirty segments. Finally, in 

 the adult condition, thirty-nine segments are distinguished 

 in the male, and sixty-four in the female.* 



