216 CAMBEIAN BRACHIOPODA. 



82c. Upper Cambrian: Conglomerate beds in the "St. Croix sandstone" in point below Franconia, Chisago 

 County, Minn. (W. A. Finkelnburg). 

 Lingulella similis. 



82s (see 82). Upper Cambrian: "St. Croix sandstone" on the bank of St. Croix River, St. Croix Falls, Polk 

 County, Wis. (C. Schuchert, 1893). 

 Obolus matinalis. 

 Lingulella (Lingulepis) acuminata. 



83. Upper Cambrian: "St. Croix sandstone" near Trempealeau, Trempealeau County, Wis. (Cooper Curtice 

 and G. H. Squiers, 1884). 



Finkelnburgia osceola. 

 Syntrophia barabuensis. 

 Chariocephalus whitfieldi Hall. 



Obolus matinalis. 

 Dicellomus politus. 

 Eoorthis diablo. 

 *Finkelnburgia finkelnburgi. 



83' (=135c). (Chas. Schuchert, 1893.) 

 Billingsella coloradoensis. 

 Finkelnburgia finkelnburgi. 

 Finkelnburgia osceola. 



83-^ Upper Cambrian: Green-sand horizon in the "St. Croix sandstone," below the "fifth trilobite bed" of 

 Owen, at Trempealeau, Trempealeau Coimty, Wis. (Chas. Schuchert, 1893). 

 Billingsella coloradoensis. 

 Chariocephalus whitfieldi Hall. 



83*. Middle Cambrian: "St. Croix sandstone," in beds characterized by the presence of Crepicephalus iowensis, 

 at Trempealeau, Trempealeau County, Wis. (C. Schuchert, 1893). (See p. 159.) 

 Obolus matinalis. 



84. Middle Cambrian: "St. Croix sandstone" at Dresbach, opposite the mouth of Black River, Winona County, 

 Minn. (Cooper Curtice, 1884). (See p. 159.) 



Lingulella (Lingulepis) acuminata. 

 Dicellomus politus. 



Obolus namouna. 

 Obolus rhea. 

 Lingulella ampla. 



84a. Upper Cambrian: "St. Croix sandstone," River Junction, Houston County, 20 miles ("32.2 km.) below 

 Dresbach, Minn. (Cooper Curtice, 1884). 

 Lingulella phaon." I Dikellocephalus misa Hall. 



Billingsella coloradoensis. Chariocephalus whitfieldi Hall. 



Syntrophia primordialis. I 



84f. Middle Cambrian: "St. Croix sandstone" at Dresbach, opposite the mouth of Black River, Winona 

 County, Minn. (W. A. Finkelnburg, 1897). (See p. 159.) 

 Lingulella ampla. 

 Dicellomus politus. 



84s. Middle Cambrian: "St. Croix sandstone" near Dakota, Winona County, Minn. (Chas. Schuchert, 1893). 

 (See p. 159.) 

 Lingulella ampla. 



Lingulella (Lingulepis) acuminata. 

 Dicellomus politus. 



85 (=85s). Upper Cambrian: "St. Croix sandstone" at Prairie du Sac, Sauk County, Wis. (Cooper Curtice, 1884). 

 Obolus (Westonia) stoneanus. 

 *Lingulella mosia. 



8Sa. Upper Cambrian: "St. Croix sandstone" at Brown's quarry, Prairie du Sac, Sauk County, Wis. (Cooper 

 Curtice, 1884). 

 Lingulella oweni. 



85s (=85, though possibly from a slightly different bed). Upper Cambrian: "St. Croix sandstone" at Prairie du 

 Sac, Sauk County, Wis. (Chas. Schuchert, 1893). 



Obolus (Westonia) aurora. 

 *Obolus (Westonia) stoneanus. 

 Lingulella mosia. 

 Lingulella oweni. 

 Lingulella winona. 



Lingulella winona convexa. 

 lUsenurus quadratus Hall. 

 Dikellocephalus minnesotensis Owen. 

 Dikellocephalus pepinensis Owen. 



a May be from a horizon different from that of the other species. 



