EXPLANATION OF PLATE 37 



Fig. 1. DRILL How. 



(Cat. 1ST. G3804, U. S. N.M. Point Hope. Collected by E. W. Nelson. 



Fig. 2. DRILL Bow. 



(Cat. No. 45346, IT. S. N. M. Cape Nome. Collected by E. W. Nelson.) 



Fig. 3. DRILL Bow. 



(Cat, No. 33191, IT. S. N. M. Norton Sound. Collected by E. W. Nelson.) 

 Fig. 4. DRILL Bow. 



(Cat. No. 89510, U. S. N. M. Point Barrow. Collected by Lieut. P. H. Ray. IT. S. A.) 



Fig. 5. DRILL Bow. 



(Cat. No. 56518, U. S. N. M. Point Barrow. Collected by Lieut. P. H. Ray, U. S. A.) 

 Fig. 6. DRILL Bow. This specimen is 24f inches long. 



(Cat. No. 24540, U. S. N. M. St. Michaels. Collected by L. M. Tiirner.) 



