72 PLATE XXXIL 



FIG. III. and FIG. IV. 

 PROTEUS TENAX. 



GENERIC CHARACTER. 

 An invifible, very fimple, pellucid Worm, of a variable form* 



SPECIFIC CHARACTER. 

 Running out into a fine point. — M'uller. 



A gelatinous pellucid body, ftored with black molecules ; it changes 

 its form in a regular order, firfr. extending itfeif out in a {trait line 3 

 the lower part terminating in an acute bright point, without 2ny in- 

 terlines, and the globules being all collected in the upper part, it next 

 draws the pointed end up towards the middle of the body, fwelling it 

 into a round form. The contraction goes on for fome time, after which 

 the lower part is fwelled as in Fig. IV. The point is afterwards projected 

 from this ventricofe part. It paffes through five different forms before 

 jt arrives at that reprefented at Fig. IV. It fcarcely moves from one 

 fpot, only bending about fideways. It is to be found in river water s 

 where the Nit'ida grows.-— Adams on the Microfcope, 



PLATE 



