STUDIES IN ANIMAL LIFE. 



Now the head is drawn in as if it were swallowed 

 and suddenly in its place are unfolded two broad 

 membranes, having each a circle of waving cilia. 

 The lifeless oval has become a living animal ! You 

 have assisted at a resuscitation, not from death by 

 drowning, but by drying: the animal has been 

 drowned into life ! The unfolded membranes, with 

 their cilia, have so much the appearance of wheels 

 that the name of " "Wheel-bearer" (Rotifera) or 

 " Wheel Animalcule" has been given to the animal. 



Fig. 16. ROTTFEB VULGABIB. 



A, with the wheels drawn in (at c). B, with the wheels expanded; 6, eye 

 ppots; e, jaw and teeth; /, alimentary canal; gr, embryo; A, embryo further 

 developed : ?', water- vascular system ; fc, vent. 



