Two MiniPlug calorimeters, designed to measure the energy and
lateral position of particles in the (forward) pseudorapidity region of 3.6
< |eta| < 5.2 of the CDF detector, have been recently installed as part of
the Run II CDF upgrade at the Tevatron p anti-p collider.  They consist of
lead/liquid scintillator read out by wavelength shifting fibers arranged in
a pixel-type towerless geometry suitable for 'calorimetric tracking'.  The
design concept, the prototype performance and the final design of the
MiniPlugs are here described.  A recent cosmic ray test resulted in a light
yield of approximately 100 pe/MIT, which exceeds our design requirements.