io8 

 J. 



The Structure and Habits of Spiders. 



under which is a pair of little knobs, snch as ap- 

 pearol at first on the thoracic segments; then 

 appear two pairs, then three, and so on, till there 

 are six pairs, which mark the slk segments of 

 the abdomen. Up to this tim^ the embryo has 



Ffe.64. 



been rolled up with the under side ontward ; but 

 now it begins to turn, and in a day or two has 

 its back outward. Fig. 64, c. The constriction 

 between the thorax and abdomen b^ins about 

 this time ; and in a few days more the spider is 

 ready to hatch. Fig. 64, d. 



