AMONG SIMPLE SABCODE OEGANISMS. 



303 



the body assumes a spherical shape, and, after expelling the un- 

 digested remains of the nutriment, envelops itself in a thick 

 membrane. 



As an aberrant form of the Heliozoa, from the typical members 

 of which it departs chiefly in the want of the permanent spherical 

 (homaxial) form, may here be included the Actinolophus peduncu- 

 latus(Gg. 19) of Fr. Eilhard Schulze. Under this name Schulze de- 

 scribed a remarkable pedunculated Ehizopod which attaches itself 

 to marine Algse and to Gonothyrcea Loveni and other Hydroids. It 

 presents itself in two different states. In one the body is quite 

 destitute of hard parts ; in the other it is invested by a siliceous 



covering. 



Fig. 19. 



Actinolophus pedunculatus. A. State in which the body is destitute of hard 

 parts. B. State in which the body is invested by a siliceous scaly coYering 

 through which the pseudopodia pass outwards to the siirroxmding water. 

 (After Schulze.) 



