76 



THE ANATOMY OF INVERTEBRATED ANIMALS. 



escapes from the cyst, and recommences the predatory life of 

 its parent. In this case the myxopod becomes encysted, and 



Fig, 1. — Trotomyx.a aurardiaca (Haeckel").— c, the Ptill condition snrronnded hy a 

 Btructurcless cyst ; h. encysted form, the protoplasm of which is dividinc:; c, the 

 cy?t burstini^and pivin;jf exit to the bodies into which the protoplasm breaks np. 

 These are at first "monads,'' d, earh beinp: provided with a flajrelliform cilinm, 

 by means of which it propels itself (cT). After a time each monad retracts its 

 cilinm. and resumes an Amoeba like form (e> ; many of these coalesce and form 

 a single plasmodinm. which crows and feeds nnder the form /. The specimen 

 fieared contains a Peridinhim. (above"), three J)ictyocyi(t(v. (below), and two I)<th' 

 mi'v (Diatomaceoup plants). In the centre. (Hacckel^ " Stadicn uber Mouereu," 

 1870.) 



