PLATE 24 



FiQS. Enteletes lamarcki Fischer 



1, 5, 8, 9. — Dorsal, ventral, posterior, and lateral views of 



exterior, showing fine Schizofhoria ornamentation 

 superimposed over plications. 



Up. Carboniferous, Mjatschkowa, Russia. Cat. No. 



S1495. xl. 



Enteletes dumblei Girty 



2, 6, 10. — Ventral interior, showing three prominent septa, 



X 1.5. Figs. 2 and 6 seen from the side. 

 3. — Dorsal interior, showing flaring brachiophore supports 



and curved brachiophores, x 2. 

 7. — Small interarea of ventral valve, x 1.5. 



Pennsylvanian (Word) , Glass Mts., W. Texas. Fig. 

 2 is Cat. No. S 2224, the others are specimens in 

 the Univ. of Texas collections. 



Enteletes cf. dumblei Girty 

 25. — Dorsal valve seen from the side, showing tusklike 

 brachiophores and a fulcral plate in place. 

 Permian (Wolfcamp), N. E. of Wolfcamp, Glass 

 Mts., W. Texas. Cat. No. S 1 501. x 3. 



Parenteletes cooperi King 

 11, 13, 18. — Anterior, lateral, and posterior views of exte- 

 rior, showing strong ventral fold and ornamentation 

 of an adult. 

 14, 16. — Ventral and dorsal views of exterior of a young 

 specimen. 

 Pennsylvanian (Gaptank), near Gaptank, Glass Mts., 

 W. Texas. Univ. Texas colls. 



Figs. Parenteletes cooperi King — Cont. 



2 1 , 26. — Ventral interior of cotypes, showing septa and 

 camera under anterior end of median septum. 



Permian (Uddenites zone), Hill 4752, Glass Mts., 



W. Texas. Cat. No. S 1494. x 2. 



Enteletella nikschitschi Likharev 

 4. — Lateral view of a complete individual, after Likharev. 

 Low. Permian, northern Caucasia. 



Orthotichia afJ. morganiana (Derby) 



12. — Extreme posterior portion of dorsal valve, showing 



cardinal process and a complete brachiophore. x 1.5. 

 15. — Posterior portion of a ventral valve, showing elevated 



median septum, x 2. 

 22. — Ventral view, with shell worn off, showing three 



septa, X 1. 

 23,24,27. — Posterior, ventral, and dorsal exterior views. 



X 1. 

 Pennsylvanian, near Saddle Mt., S. E. of Winkel- 

 man, Ariz., near Gila River. Cat. No. S 1493. 



Enteletina latesinuata (Waagen) 

 17. — Ventral interior, showing subparallel dental plates and 



simple median septum. Cf. fig. 10. 

 19. — Ventral exterior, showing prominent fold. 

 20. — Dorsal interior. Shape of brachiophore process 

 normal, but lateral curvature undoubtedly incorrect. 

 Middle Productus Is., Musakheyl, India. All after 

 Waagen 1887. 



242 



