4 PLATE. XXXIf. 
J 
FIG. Ill. 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 —AZiller. 
I EE I 
A gelatinous pellucid body, ftored with black molecules ; it changes 
its form in a regular order, firft extending itfelf out in a ftrait line, 
the lower part terminating in an, acute bright point, without any in- 
teftines, 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 contra¢tion 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 
it arrives at that reprefented at Fig. 1V. It fearcely moves from one 
fpot, only bending about fideways. Tt is to be found in river water, 
where the Nitida grows.—Adams on the Microfcope. 
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