EXPLANATION OF PLATE 19. 



Fig. 1. GRAVER. 



(Cat. Xo. 48549, IT. S. N. M . Kotzebue Sound. Collected by E. W. Nelson.) 



Fig. 2. GRAVER. 



(Cat. Xo. 2307, V. S. X. M. Anderson River. Collected by II. McFarlane ) 



Fig. 3. GRAVER. 



(Cat. Xo. 2094, U. S. X. M. Anderson River. Collected by K. McFarlane.) 



Fig. 4. GRAVER. 



(Cat. Xo. 46080, I . S. X T . M. Tort Clarence. Collected by \V. H. Dall.) 



Fig. 5. GRAVER. 



(Cat. Xo. 44591, V. S. X. M. Cape Xonie. Collected by E. AA&quot;. Xelson.) 



