10 6 HYATT ON THE TERTIAKY SPECIES 



EXPLANATION OF THE PLATES. 

 Plate I. 



Magnified 2 diameters. 



List op Species. 



PI. Steinheimensis var. aequiumbilicatus, line a 1-4, b 17, c 1, 19, m 1-7. 

 PI. Steinheimensis line a 5-11, b 2-16, d 5, f 18, h 13, m 8-11, n 1-5. 

 PI. "^fe?*" line a 12-16, m 12-14. 



pi Ermmii lino f 1_S 



-P?- steiSS^. line b 1, c 13-14, d 1-4, e 16, n 6, 18. 



PL te?iuis, line c 2-12, 15-18, d 6-17, e 1-15, k 11, n 7-13, 14-15, o 1-7. 



PI discoideus, line f 4-17, g 1-14, h 1-12, i 1-12, k 1-5, 12, 1 1-10, o 8-14, 16 fnamed specimen^, pl-13. 



PI. discoideus var. involutus, line d 18, e 17-19. 



-P^- "SSfS? line k 7, line o 15. 



-Pi- 'iSJuieT^- (var. elegans Hilg.), line k 6. 



PI. trochiformis { = trochif. typus Hilg.), line k 8-10, 1 11-12. 



Check List by Lestes. 



Line a, figs. 1-4 PI. Steinheimensis var. aequiumbilicatus, 5-11 PI. Stemheiniensis, 12-16 PI. °^^'"™ 



Line b, fig. 1 PL stdnuSenm, 2-16 PL Steinheimensis,^ 17 PL Steinheimensis var. aequiumbilicatus. 



Line c, fig. 1 PL Steinheimensis var. aequiumbilicatus, 2-12 PL tenuis, 13-14 PL stei£^^insis 15-18 PL 

 tenuis, 19 PL Steinheimensis var. aequiumbilicatus. 



Line d, figs. 1-4 PL sudSS^Lmi,, 5 P^- Steinheimensis, 6-17 PL tenuis, 18 PL discoideus var. involutus. 



Line e, figs. 1-15 PL tenuis, 16 PL steiSlSensii, 17-19 PL discoideus var. involutus. 



Line f, figs. 1-3 PL siefSSZsu, *-17 PL discoideus, 18 PL Steinheimensis. 



Line g, figs. 1-14 PI. discoideus. 



Line h, figs. 1-12 PI discoideus, 13 PL Steinheimensis. 



Line i, figs. 1-12 PL discoideus. 



Line k, figs. 1-5 PL discoideus, 6 PL 'SJ^gS!' var. eleffans, 7 PL 'SJJSf ^-10 PL trochiformis, 11 

 PL tenuis, 12 PL discoideus. 



Line 1, figs. 1-10 PL discoideus, 11-12 PL trochiformis. 



Lino m, figs. 1-7 PL Steinheimensis var. aequiumbilicatus, 8-11 PL Steinheimensis, 12-14 PL """ft""' 



Line n, figs. 1-5 PL Steinheimensis, 6 PL staSS.nsis, 7-12 PL tenuis, 13 PL steiT^L^. 14-15 PL tenuis. 



Line o, figs. 1-7 PL tenuis, 8-14 discoideus, 16 PL discoideus (named specimen), 15 PL 'rf^S™** 



Line p, figs. 1-13 PL discoideus. 



Check List bt Sections and Formations. 



Formation a. 



Stratum a 1, Second Hole, and a. First Hole,^ Old Pit, Sections 5, 6. 



PL Stei/ihciii/ensis var. aequiumbilicatus, line a 1-4, b l7, c 1, 19. 

 PL Steiiihei»,ensis, line a 5-11, b 2-16, d 5, f 18, h 13. 

 PL ""1:1:^' a 12-16. 



PI- s.JS::'::L,, une f 1-3. 



PI- stciSZ^is, line b 1, c 13-14, d 1-4, e 16. 



1 Figs. 10-12 are very similar to PL m. parvus Hilg. lines k-1, a special suite from the First Hole, Sect. 6 taken 



Tines a-k show a mingling of forms from both holes; during ray second visit to Steinheim. 



