DESCRIPTION OF PLATE XII. 137 



/, Four bundles of long internal muscles. 



y, 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, (A, A), 



withdrawn, appearing like two hemispherical radiated disks. 



d, The jaws and teeth. 



e, The stomach. 

 k, 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-animalcule with the body much shrunk down, and the 

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

 (a); p. 76. 



d, The masticatory apparatus. 

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

 h, The pedicle. % 



