PLATE 37 



All figures natural size 

 Figs. 1-8; 10-13. Ptyctodits comprcssus Eastman. 



1, E 2406, p. III. 



2, E 1917, p. no. 



3, E 1914a, p. no. 



4, E 1914, p. no. 



5, E 1914a, p. no. 



6, E 1914, p. no. 



7, E 2433 (By inadvertence this is the same specimen as the one figured in PI. 36, 

 fig. II.) 



8, E 2432, p. III. 



10, E 2408, p. III. 



11, E 2404, p. III. 



12, E 1911, p. no. 



13, E 2408, p. in. 



P"ig. 9, Ptyctodus cakcoliis Newb. and Worthen, E 1913, p. 109. 



272 



