EXPLANATIOX OF PLATE IV. 



All the drawings were made by J. Henry Blake. 



Fig. 1. (14601) (?) Telmatrecbiis parallelns. 



2. (14600) (I) Plecia pealei. 



3. (14594) (?) Plecia pealei. 



4. (x) Indusia calcnlosa. (Copied by Zittel, 



Handb. d. paheoiit., Fifj. 985.) 



5. (""i*) Corydalites fecuiidiim. Sniiimit of 



egg from above. 



6. (^f) Corydalites fecmidnni. Sinuiiiit of 



.egg from Side. 



7. Ci") Corydalites fecundum. Base of egg 



inclosed in its cell. 



8. (6i) (f ) Ccelidia wyomiugensis. 



9. (St. 16) (1,") Sciomyza iiianca*. 



10. (14613) (?) Plecia pealei. 



11. (14596) (?) Plecia pealei. 



12. (4a) (?) Plecia pealei. 



13. (f) Corydalitesfcenndiini. Tberiglit baud 



portion of Fig. 14 enlarged. 



14. {i) Corydalites fecundum. Side view of 



one-half of egg-mass, broken longitudi- 

 nally in the middle. 

 674 



Fig. 15. Corydalites fecundum. Schematic figure, 

 cross-section. 



16. (I) Corydalites fecundum. Siuo view of 

 egg-mass. (Copied by Zittel, 1. c, Fig. 

 981n. 



17. {\-) Corydalis cornutns (recent). Side 

 view of egg. 



18. (-'"p) Corydalites fecundum. Crateriform 



micropylic prominence of summit of egg. 



19. (I) Corydalites fecundum. Sawu cross- 

 section of egg-mass. 



20. (I) Corydalites fecundum. Rock frag- 



ment, showing two egg masses embedded 

 in it, with fresh-water gastropods beside 

 them. 



21. (\') Corydalites fecundum. Side view of 

 egg. (Copied by Zittel, 1. c, Fig. 9816.) 



22. (■'-f) Corydalus cornutns (recent). Side 

 view of summit of egg. 



23. (I) Corydalites fecundum. Broken cross- 



section of egg-mass. 



