Structure and Economy of Spiders. 485 



of Clubiona atrox had the palpus and the second leg on the right 

 side divided, the former near its base, the latter about the 

 middle of the femur, and on the 15th of the succeeding month 

 it cast its skin ; yet, though all the other limbs were renewed, 

 the stumps only of the mutilated members were reproduced. In 

 cases where spiders spontaneously throw off their legs at the 

 suture, or have them partially removed by amputation, it would 

 be desirable to ascertain in what state the rudiments of the 

 limbs to be reproduced exist just previously to the act of moult- 

 ing, as there is something mysterious in their extraordinarj'" 

 development during that process. 



For the drawings which accompany this communication, I am 

 indebted to Mr. John Parry, of Manchester ; and it gives me 

 much pleasure that I am enabled to employ his skilful and accu- 

 rate pencil in a manner so congenial to his taste, as in illustra- 

 ting new and interesting facts in natural history. 



EXPLANATION OF TAB. XXXI. 



Fig. 1. A newly formed flocculus highly magnified. 



Fig. 2. A representation of the tarsus of one of the hind-legs of 

 Clubiona atrox, highly magnified ; a, the upper row of 

 spines ; b, the lower row of spines ; c, the spur at the 

 lower extremity of the apparatus. 



Fig. 3. A view of the superior joint of the tarsus, highly mag- 

 nified; a, the upper row of spines; b, the lower row 

 of spines ; c, the spur. 



Fig. 4. The foot of the right anterior leg of Epeira Diadetna, 

 highly magnified. 



Fig. 5. A setaceous bristle from one of the tarsi, magnified, of 

 My gale avicularia. 



Fig. 6. A compound hair from the Aranea domestica, magnified. 



XXVII. Remarks 



