134 



DESCRIPTION OF PLATE XI. 



ILLUSTRATION OF THE DEVELOPMENT OF THE YOUNG 

 STEPHANOCEROS. 



( Page 67. ) 



Fig. 1. The young animalcule, represented in pi. x, (fig. 2, h), as it ap- 

 peared thirty hours after its exclusion from the parent 

 sheath; p. 69. 

 a, Apparently the rudiments of the arms. 

 c, The cilia. 

 Fig. 2. The same individual eighty hours after exclusion ; the body ap- 

 pears much shortened from being somewhat contracted ; 

 p. 69. 



a, The arms, five in number ; but only four are seen in this 



view. 



b, The stomach. 



Fig. 3. A young Stephanoceros eighty-four hours after exclusion from 

 the e^^, but still retained within the sheath of the parent, 

 which perished ; p. 69*. 

 a, The arms, or tentacula. 

 h, The jaws. 



*, Remains of the sheath of the parent. 

 Fig. 4. A sketch of part of the body of a Stephanoceros, to shew the de- 

 velopment of the egg ; p. 68. 



* The above three figures were drawn with the camera lucida; the magnifying 

 power employed was the i-inch object glass of Ross's Achromatic. 



