EXPLANATION OF PLATE 19. 



Fig. 1. GRA^ ER. 



(Cat. No. 48549, U. S. K. M. Kotzebue Souixl. Collected by E. W. Nel.son.) 



Fig. 2. Graver. 



(Cat. Xo. 2;i07, v. S. X. M. AiuUrsoii Eiver. Collected by 11. McFarlane ) 



Fig. 3. Graver. 



(Crtt. No. 2094, U. S. N. M. Aiulerson River. Collected by It. McFarlane.) 



Fig. 4. Graver. 



(Cat. No. 46080, U. S. N. M. Port Clareuce. Collected by W. H. Dall.) 



Fig. 5. Graver. 



(Cat. No. 44591, V. S. N. M. Cai)e Nome. Collected by E. W. Nelson.) 



