DESCRIPTION OF PLATE XII. 137 



/, Four bundles of long internal muscles. 



g, Eggs in the ovisac ; the red eyes of one of the young are 



very manifest. 

 h, The tail, or pedicle. 

 Fig. 4. A Rotifer with the proboscis, (a), extended, and the wheels, {Jb, b), 



withdrawn, appearing like two hemispherical radiated disks. 



d, The jaws and teeth. 



e. The stomach. 

 h, The pedicle. 



Fig. 5. A young Rotifer just escaped from the egg ; p. 75. 



Fig. 6. A Rotifer with the body bent over arch-wise, in the act of 

 moving along the surface of the stem of a plant. Loco- 

 motion is performed as in the Hydrse (see pi. i, fig. 9); 

 p. 76. 



Fig. 7. A Wheel-aniiiuilcule with the body much shrunk down, and the 

 wheels drawn in ; a few cilia only appearing at the mouth, 



(«); p. 76. 



d, The masticatory apparatus. 



g, The red eyes of an embryo in the ovisac. 



h, The pedicle. 



