184 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 23 



PLATE 4 



Propeartiussium (Parvamussiuin) davidsoni (Dall), 1897. Paratype. 

 U.S. Fish Comm. station 4470, Bowers Bank, Bering Sea, in 247 

 fathoms. Height and length: 9.5 mm. (Grau collection.) P. 



