TAEDIGEADA. 



669 



leg-like process attached to the sides of each ring of the body 

 and ending in a pair of claws). In size they are microscopic 

 and live in standing water among plants, and like the Rota- 

 toria revive after being apparently dead and dried up. They 

 were called Tardigrades from their excessively slow motions. 

 The eggs are very large and are laid b^'^ the parent after the 

 last moult ; the j'oung is born with its full complement of legs, 

 and moults several times before arriving at maturity. The 

 eggs of some genera are smooth, while those of Macrobiotus 

 are spherical and covered with little knob-like projections. 



Milnesinm tardigradum Schrank (Fig. 643, I, mouth-parts ; 

 &, alimentary canal ; ov, ovary) is a fifth of a line long ; Avhile 

 Emydium testudo Doyere (Fig. 644, magnified one hundred 

 and twenty times) is another European species. None have 

 yet been noticed as occurring in this country. 



Fig. 644. 



Emydium testudo. 



