134 



DESCRIPTION OF PLATE XL 



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. 



, 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 egg, but still retained within the sheath of the parent, 

 which perished ; p. 69*. 

 fl, The arms, or tentacula. 

 6, 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 J-inch object glass of Ross's Achromatic. 



