PLATE 4. 



Fig. 1. — Parastacus araucanius Faxon, cf. Corral, Chile, Dec. 18, 1908. Tj-pe. M. C. Z., Xo. 



7,3.5.5. 

 Fig. 2. — EpLstoma of the .=aine. 

 Fig. 3. — Antennal scale from the right antenna, upper face. 



