PLATE X. 



Page. 

 Figs. 1-11. Goni.\tites striatus Sowerby { = GlyiMocei-as cumminsi liy&H) 80 



Lower Carboniferous, St. Louis-Chester stage, Bend formation, 5 miles west of Lampasas, 

 Tex. 



Figs. 1 and 2. Adolescent stage. 



Fig. 3. Shell at this stage. 



Figs. 4 and 5. Early adolescent stage. 



Fig. 6. Shell at this stage. 



tigs. 7 and 8. Early adolescent stage. 



Figs. 9 and 10. Fully niaturefi stage. 



Fig. 11. Shell at this stage. 

 Figs. 12-16. Goniatites crenistri.\ Phillips ( = Glypldocerm incimm Hyatt) 68 



Lower Carboniferous, St. Louis-Chester stage, Bend formation, near Richland Springs, San 

 Saba County, Tex. 



Figs. 12 and 13. Early adult stage. 



Figs. 14 and 15. Cross .stri:e on mature shell. 



Fig. 16. Restoration of the form after fig. 15. 

 Figs. 17-19. G.\striocer.\s entogonum Gabb 87 



Lower Carboniferous, St. Louis-Chester stage. Bend formation, 5 miles west of Lampasas, 

 Tex. 



Figs. 17 and 18. Front and side view. 



Fig. 19. Shell enlarged. 



Note. — This plate is taken from Fourth Ann. Rept. Geol. Surv. Texas, PI. XLVII. 



168 J 



