EXPLANATION OF PLATE IV. 



All the drawings were made by J. Henry Blake. 



Fig. 1. (14601) (?) Telmatrechus parallel. 



2. (14600) (|) Plecia pealei. 



3. (14594) (?) Plecia pealei. 



4. ({) Indusia calculoaa. (Copied by Zittel, 



Handb. A. palieont., Fig. 985.) 



5. ( a 1 l ) Corydalites fecundum. Summit of 



egg from above. 



6. ( 3 , s ) Corydalites fecimdnm. Summit of 



egg from side. 



7. C, 1 ) Corydalites fecundum. Base of egg 



inclosed ill its cell. 



8. (66) (?) Crclidia wyoroiugeusis. 



9. (St. 16) (V s ) Sciomyza manca?. 



10. (14613) (?) Plecia pealei. 



11. (14596) (?) Plecia pealei. 



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



13. (f) Corydalites fecundum. Therighthaud 



portion of Fig. 14 enlarged. 



14. (^) Corydalites fecundum. Side view of 



one-half of egg-mass, broken longitudi- 

 nally in the middle. 

 674 



Fig. 15. Corydalites fecnndum. Schematic figure, 

 cross-section. 



16. (}) Corydalites fecundum. Side view of 

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

 981a. 



17. (Y) Corydalis cornutus (recent). Side 

 view of egg. 



18. (-"-pO Corydalites fecundum. Crateriform 



ruicropylic prominence of summit of egg. 



19. (|) Corydalites fecundum. Sawn cross- 

 section of egg-mass. 



'20. (|) 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. e., Fig. 9816.) 



22. (*f) Corydalus cornutus (recent). Side 

 view of summit of egg. 



23. (}) Corydalites fecundum. Broken cross- 



section of egg-mass. 



