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breadth than in length at the gradual growth of the 
animal, 2) the legs increase comparatively but a little 
more than the length of the cephalothoracic shield (in 
the largest specimen the trochanter + femur is but a 
little more than double the length, in the smallest ones 
almost double the length of the cephalothoracic shield) 
3) the palpi are growing quite disproportionately in 
lensth in proportion to the body and the legs (in the 
largest „specimen the trochanter + femur together are 
more than öt/s times as long, in the smallest specimen 
not 14/2 times as long as the cephalothoracic shield) 
which makes an exceedingly great difference 
in the appearance of large and small spe- 
cimens. 
But I have discovered some, if possible still more 
bewildering age-differences. In the largest specimen only 
two spines are to be found on the upper interior margin 
of the tibia of the palpi, they are very long and placed 
closely together on the forecorner. In the middlemost 
specimen a little behind those 2 spines, on the same 
upper interior margin is a 3d spine, the length of which 
is about 1/3 of the diameter of the tibia at the basis of 
the spine; in the smallest specimen this last spine is 
almost as long as the diameter of the tibia, and more 
removed backwards, and on the same margin is still a 
couple of small spines a little apart from each other. 
It is seen from my rich material consisting of c. 25 
specimens of all sizes from the same locality that 
this reduction of spines on the upper interior 
margin of tibia according to the growth of the 
animal is a rule in this species. The 3 posterior 
of the 5 spines found in the small specimens on the 
interior lower margin of tibia, are lost quite in the 
same way. On the contrary, on the following joint of 
the palpi there are in all ages only 2 spines, one above 
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