Structure and Economy of Spiders. 485 
of Clubiona atrox had the palpus and the second leg on the right 
side divided, the former néar 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 extraordinary 
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. 
oo sacco loire m — 
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 atroz, 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 piles: b, the lower row 
of spines; c, the spur. 
Fig. 4. The foot of the right anterior leg of Edfira Diadema, 
highly magnified. 
Fig. 5. A setaceous bristle from one of the tarsi, magnified, of 
Mygale avicularia. 
Fig. 6. A compound hair from the Aranea domestica, magnified. 
XXVII. Remarks 
