LOCALITIES. 187 



16j. (For stratigraphic position and association, see p. 145.) Middle Cambrian: Umestojies oi Paradoxides forch- 

 hammeri zone at Laesa^, Bornholm Island, Denmark (K. A. Gronwall, 1903). 



Micromitra pusilla. 

 Lingulella ferruginea. 

 Acrothele coriacea. 



Acrotreta sagittalis. 

 Acrotreta schmalenseei. 



16k. (For stratigraphic position and association, see p. 146.) Middle Cambrian: Limestones of Paradoxides 

 davidis zone at LaesaS,, Bornholm Island, Denmarlc (K. A. Gronwall, 1903). 

 Acrothele coriacea. 

 Acrotreta sagittalis. 



161. (For stratigraphic position and association, see p. 146.) Middle Cambrian: Limestones of Paradoxides 

 davidis zone at Borregaard, Bornholm Island, Denmark (K. A. Gronwall, 1903). 

 Acrothele coriacea. 

 Acrotreta sagittalis. 



16n. Upper Cambrian: Interformational conglomerate and shales in Adams pasture, 0.5 mile (0.8 km.) west 

 of Main Street, on Lake Street, St. Albans, Franklin County, Vt. (Geo. H. Edson; H. E. Dickhaut, 1903). 

 Lingulella?. 



Lingulella (Lingulepis) acuminata. 

 Yorkia sp. 



16o. (For stratigraphic position and association, see p. 131.) Upper Cambrian: Shales on McMullins Brook, in 

 the East Boisdale district, eastern Cape Breton, Nova Scotia (S. W. Loper, 1903). 

 Lingulella concinna. 



17b. (For stratigraphic position and association, see p. 147.) Lower Cambrian: Rome (" Monte vallo") 

 formation 4 miles (6.4 km.) south of Helena, Shelby County, Ala. (C. D. Walcott, 1895). 

 Micromitra (Paterina) major. j Obolus smithi. 



Micromitra (Paterina) williardi. I *Wimanella shelbyensis. 



17c. Middle Cambrian: Sandy limestone 235 feet (71,6 m.) above the "Tonto" sandstone. Grand View trail 

 north of Last Chance copper mine, south side of the Grand Canyon of the Colorado, Arizona. 

 *Obolus (Westonia) themis. 

 Lingulella acutangula. 

 Lingulella lineolata. 



17j. Middle Cambrian: Limestone in the east end of the town of Galena, Black Hills, South Dakota. 

 Lingulella similis. 



17k. Middle Cambrian: Limestone thrown out on the dump of the Great Northern shaft, southeast of Twobit, 

 northern Black Hills, I^awrence County, South Dakota. 

 Linnarssonella girtyi. 



18. (For stratigraphic position and association, see p. 147.) Middle Cambrian: Limestone 1 mile (1.6 km.) east 

 of Gap Creek, 13 miles (20.8 km.) S. 75° E. of Knoxville, Knox County, Tenn. (A. Keith and C. D. Walcott). 

 Acrotreta kutorgai?. 



20 (see 21a). Lower Cambrian: Limestone on the south side of Mettawee River, 0.25 mile (0.4 km.) above the 

 North Granville bridge. Fort Ann quadrangle (U. S. G. S.), Washington County, N. Y. (C. D. Walcott, 

 1890). 



Obolella crassa. 



Medusa? sp. 



20a. Lower Cambrian: Gray limestone interbedded with shaly slates in a lane west of Lafayette Stevens's house, 

 about 100 yards (91.4 m.) from the main road in the southern part of "^ATiitehall township, Fort Ann quad- 

 rangle (U. S. G. S.), Washington County, N. Y. (C. D. Walcott, 1890). 



Lingulella granvillensis. 

 Acrotreta sagittalis taconica. 

 Hyolithellus micans (Billings). 

 Microdiscus connexus Walcott. 



Olenellus?. 



Olenoides fordi Walcott. 



Ptychoparia sp. 



21. Lower Cambrian: Shales 1.5 miles (2.4 km.) south of Salem, Cambridge quadrangle (U. S. G. S.), Washington 

 County, N. Y. (C. D. Walcott, 1890). 



Billingsella salemensis. 

 Archaeocyathus dwighti Walcott. 

 Stenotheca rugosa (Hall). 

 Fordilla troyensis Barrande. 



Microdiscus lobatus (Hall). 



Olenellus. 



Solenopleura? tumida Walcott. 



Leperditia? dermatoides (Walcott). 



