U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 58 PL. 31 



/^e/na/oeZ/rt/s ////co///.s. 



A/ems/oc//rl/s Mc^e/ianus. 



/\/e/r>a/0c//r>/5 /l/roa/l/s. 



oimm 



NEMATODIRUS FILICOLLIS, NEMATODIRUS FURCATUS, AND NEMATODIRUS 

 HELVETIANUS. 



OF PLATE SEE PAGE 588 



