NO. 2 BRACHIOPOD SUPERFAMILY STENOSCISMATACEA GRANT I33 



Fig. 31. — Coledium torvum n. sp., Morrow Series, Okla., transverse sections 

 X6, original length 11.1 mm. YPM 23260, distances given from pedicle valve beak. 



A. 0.4 mm. : camarophorium not apparent. B. 1.6 mm. : camarophorium large, 

 hinge plate detached from walls. C. 1.8 mm. : low edge of cardinal process visi- 

 ble. D. 2.0 mm. E. 2.4 mm. F. 2.7 mm. : hinge plate narrow G. 4.1 mm. : in- 

 tercamarophorial plate ended at 3.4 mm. H. 4.8 mm. : base of septum detached 

 from floor ; septa in both valves mere cracks at 5.2 mm. 



pressed only slightly below flanks, but extending anteriorly as broad 

 tongue into fold; valves meeting nearly perpendicularly around ante- 

 rior, at fold and flanks, brachial valve overlapping flattened flange of 

 pedicle valve on posterolateral slopes ; costae beginning 5-8 mm. 

 anterior to beaks, rather weak, strongest at anterior margins, number- 

 ing from three to five on fold, one fewer in sulcus, one to three, rarely 

 four, on each flank, some bifurcated ; growth lines fine, closely and 

 rather evenly spaced ; growth laminae somewhat stronger, interrupting 

 contours of valves only slightly. 



Pedicle valve somewhat swollen in umbonal region, flattening to- 

 ward flanks; then curving more strongly through sulcus; beak short, 

 bluntly pointed, with short dull beak ridges ; delthyrium small, trigonal, 

 constricted by pair of small, conjunct deltidial plates, leaving small 

 elongate oval foramen to pierce slightly apex of beak. 



