EXPLANATION OF PLATE 59. 



Fig. 1. ])i;iLL Bow. 



(Cat. Xo. 43930, U.S. N.:\r. Xubriukb. CoUi-ctid l.y E. W. Xclson.) 



Fig. 2. Dkill Bow. 



(Cat. \o. 43360, U. S.K. M. Ca])e Priiico of Wales. Collected liy E. W. Xel.son.) 



Fig. o. Drill Bow. 



(Cat. Xo. 33186, U. S. N. M. Xorton Sonii<l. Collected by E. W. Xelsoii.) 



Fig. 4. Drill Bow. 



(Cat. No. 33187, r. S.N. M. Norton Soiiiid. CoUecttul by E. W. Nelson.) 



