116 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
Zell member of Macy formation.—This member is named from the town of 
Zell, in Ste. Genevieve County, Mo., and consists of fine-textured limestone with 
green shale partings. It is 32 feet thick at the type locality and contains nodular 
and bedded brown chert. The member is 52 feet thick near Altenburg in Perry 
County but thins to 29 feet at Kings Lake. It is 22 feet thick just west of 
St. Louis. Fossils, including brachiopods, are abundant in the Zell: 
Ancistrorhyncha sp. R. cf. R. missouriensis 
Camerella bella Fenton (Fenton and Fenton) 
C. gregeri Cooper R. plattinensis Fenton 
Campylorthis deflecta (Conrad) = C. subplana Rostricellula sp. 
Cooper Schigocrania filosa (Hall) 
Doleroides gibbosus (Billings) Sowerbyella punctostriata (Mather) 
D. cf. D. pervetus (Conrad) = D. missouriensis Strophomena auburnensis Fenton 
Cooper S. delicatula Fenton 
*Glyptorthis bellarugosa (Conrad) S. dignata Fenton 
Hesperorthis tricenaria (Conrad) S. exigua Fenton 
*Opikina septata ? Salmon S. inconsueta Fenton 
*O. transitionalis (Okulitch) S. musculosa Fenton 
Opikina sp. S. plattinensis Fenton 
Pionodema subaequata (Conrad) S. winchelli Hall and Clarke 
Protozyga rotunda Cooper Strophomena sp. 
Rhynchotrema sp. Trematis foerstei Cooper 
Rostricellula cuneiformis Zygospira recurvirostris (Hall) 
(Fenton and Fenton) Z. variabilis Fenton 
Correlation of Macy formation.—The combination of genera and species in 
this formation indicates a correlation with the Carters limestone formation of 
the Central Basin of Tennessee and with the Spechts Ferry member of the De- 
corah formation. The Carters contains Camerella bella, Doleroides, Pionodema 
subaequata, and Strophomena suggestive of S. auburnensis. 
Barnhart formation.—This name is here proposed for the “Decorah” of 
Missouri which overlies the Plattin group and underlies the Kimmswick forma- 
tion. The type section is at Koch Valley School on U. S. Highway 61-67, 
2 miles south of Barnhart, Kimmswick (15’) Quadrangle. Here the formation 
consists of about 20 feet of greenish shale with interbedded thin limestones, all 
abundantly fossiliferous. The following species were collected: 
Campylorthis subplana Cooper R. missouriensis (Fenton and Fenton) 
Hesperorthis tricenaria (Conrad) Sowerbyella sp. 
Pionodema subaequata (Conrad) Strophomena delicatula Fenton 
Protozyga rotunda Cooper S. dignata Fenton 
P. superba Cooper Trematis foerstei Cooper 
Rafinesquina sinclairi Salmon Zygospira sp. 
Rostricellula cuneiformis (Fenton and Fenton) Z. lebanonensis Cooper 
Correlation of Barnhart formation—Although the lower shaly part of this 
formation was correlated with the Spechts Ferry member of the Decorah forma- 
tion by Kay (1935, p. 288), the fossils collected by the writer from the lower 
and upper parts indicate equivalence with the Guttenberg member of the De- 
corah formation rather than the Spechts Ferry. This is indicated by the great 
abundance of Pionodema, Rafinesquina, large Sowerbyella, and Zygospira, The 
writer failed to find Doleroides in the few localities visited. 
