undet. Bivalvia

Geological context: Late Cretaceous, Fox Hills Fm, Timber Lake Mbr. Collection locality: float and in place, includes many concs., from Sphenodiscus Layer up through CAZ, road cut and adjacent outcrops along W side of SD Rt. 63, from High Elk Hill to point .5 mi N, & between 5.5 and 6 mi S of intersection with US Rt. 212, High Elk Hill, 6 mi SSW of Eagle Butte village, Ziebach County, South Dakota, USA. Collected by Karl M. Waage, 1940/1941. IP number 794611; lot count 1; taphonomy=concretion; accn=IPA.07048; associatedwith=on same slab: IP.794611,IP.794868,IP.794869,IP.794870,IP.794871,IP.794872,IP.794873,IP.794874,IP.794877,IP.794878,IP.794879,IP.794880,IP.794881,IP.794882,IP.794883,IP.794884,IP.794886,IP.794887,IP.794888,IP.794889,IP.794890,IP.794891,IP.794892,IP.794893,IP.794894,IP.794895,IP.794896,IP.794897,IP.794899,IP.794900,IP.794902,IP.794904,IP.794905,IP.794906,IP.794907,IP.794908,IP.794909,IP.794910,IP.794885,IP.794898,IP.794901,IP.794903,IP.794911,IP.794876,IP.794875.