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EVENINGS AT THE MICROSCOPE 



Ha! here is the curious Skeleton Wheel-bearer Dinocharis 

 pocillum nay, several of them. 



This genus is remarkable for possessing true joints in 

 the foot; not merely telescopic inversions of the skin, but 

 permanent articulations with swollen condyles, resembling 

 those of the antennae of a beetle. Hence the Skeleton has 



SKELETON WHEEL-BEARER. 



great freedom and precision of motion; using the tips of 

 the long toes as a fixed point, it throws its body hither 

 and thither to a great distance with remarkable agility. 

 These joints admit of forward and lateral flexure, but you 

 never see the body brought backward beyond a perpen- 

 dicular position, the swelling of the terminal portion of 

 each articulation precluding further motion in that direc- 



