EXPLANATION OF PLATE 59. 



Fig. 1. DRILL Bow. 



(Cat, Xo. 43930, U. S. X. M. Xubriakh. Collected by E. W. Xolson.) 



Fig. 2. DRILL Bow. 



(Cat. No. 43360, U. S. N. M. Cape Prince of Wales. Collected by E. W. Xelson.) 



Fig. 3. DRILL Bow. 



(Cat. -So. 33186, F. S. X. M. Norton Sound. Collected by E. W. Xelson.) 



Fig. 4. DRILL Bow. 



(Cat. No. 33187, V. S. N. M. Norton Sound. Collected by E. W. Xelson.) 



