184 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I48 



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 2a. Lateral oblique view, XI, of specimen with attached tests of corals 

 and coraliform brachiopods, oriented in presumed growth position, 

 USNM 142530. 



3. Interior of pedicle valve, X 1, showing spondylium and transverse 

 groove near anterior of median septum, USNM 142531 (photo by 

 Cooper). 



3a. Anterior view of interior, X3, showing spondylium and crura 

 (camarophorium partly broken, only septum and part of spoon re- 

 maining) (photo by Cooper) USNM 142532. 



4. Dorsal view, X2, USNM 142533. 



4a. Lateral view, X2, of specimen similar to fig. 4, USNM 142534. 



5. Dorsal and lateral views, X2, USNM 142535. 



6. Dorsal view, X2, USNM 142536. 



6a. Lateral view of specimen similar to fig. 6, X2, USNM 142537. 



7. Dorsal and lateral views, X2, USNM 142538. 



8. Dorsal and lateral views, X 2, USNM 142539. 



9. Dorsal and lateral views, X2, USNM 142540. 

 10. Dorsal and lateral views, X2, USNM 142541. 



Plate 23 



1-5. — Stenoscisma venustum (Girty), Leonard Formation, Glass Mountains, 



Tex 150 



1. Pedicle valve interior, X2, showing foramen, deltidial plates, broken 

 spondylium, hinge teeth, USNM 142542 (photo by Cooper). 



2-2b. Lateral, ventral, and anterior views of brachial valve interior, 

 X2, showing camarophorium, with septum, intercamarophorial plate, 

 crura, cardinal process, hinge plate, sockets, USNM 142543 (photos 

 by Cooper). 



3-3a. Dorsal and ventral views, Xl.5, showing well-developed stolid- 

 ium, USNM 142544 (photo by Cooper). 



4. Lateral view of internal structures, Xl.5, showing relative positions 

 of spondylium, crura, and camarophorium with valve open to maxi- 

 mum, USNM 142545. 



5. Lateral interior views, Xl.5, detail of camarophorium, USNM 

 142547 (photo by Cooper). 



Plate 24 



1-10. — Torynechus caelatus Cooper and Grant, XI (no. 10 is X2), from 



Leonard Formation, Glass Mountains, Tex 154 



1. Dorsal and lateral views, USNM 142548, USNM loc. 702. 



2. Dorsal and lateral views, USNM 142549, USNM loc. 702 un. 



3. Dorsal and lateral views, USNM 142550, USNM loc. 702. 



4. Dorsal and lateral views, USNM 142551, USNM loc. 702 un. 



5. Dorsal and lateral views, USNM 142552, USNM loc. 702 un. 



6. Dorsal, lateral, and anterior views, USNM 142553, USNM loc. 

 702 un. (photo by Cooper, 1944, pi. 120, figs. 49-51). 



7. Dorsal, ventral, and anterior views, USNM 142554, USNM loc. 

 702 un. 



