266 CAMBRIAN BRACHIOPODA. 



338f [U. S. National Museum]. Lower Cambrian: Limestone near Argyle, 8 miles (12.8 km.) north of Greenwich, 

 Cambridge quadrangle (U. S. G. S.), Washington County, N. Y. 

 Acrotreta sagittalis taconica. 



338g [U. S. National Museum]. Lower Cambrian: Limestone in the town of Greenwich, Cambridge quadrangle 

 (U. S. G. S.), Washington County, N. Y. 

 Acrotreta sagittalis taconica. 



338h [U. S. National Museum]. (See Walcott, 1888, pp. 316 and 317, for section.) Lower Cambrian: Limestone 

 on the summit of Bald Mountain, about 2 miles (3.2 km.) northwest of Greenwich, Schuylerville quadrangle 

 (U. S. G. S.), Washington County, N. Y. 



Botsfordia cselata. 

 Acrotreta sagittalis taconica. 

 Obolella sp. 



Hyolithellus micans (Billings). 

 Microdiscus speciosus Ford. 

 Olenellus thompsoni (Hall). 



338i [U. S. National Museum]. Ordovician: Shales 1 mile (1.6 km.) west-northwest of South Argyle, near the line 

 between the Schuylerville and Cambridge quadrangles (U. S. G. S.), Washington County, N. Y 

 Acrothele pretiosa. 



338] [Hall, 1847, p. 4]. Upper Cambrian: Potsdam sandstone near Alexandria Landing, Jefferson County, N. Y. 

 Lingulella (Lingulepis) acuminata. 



338k [U. S. National Museum]. (See 72a.) Lower Cambrian: Limestone 2.5 miles (4 km.) southwest of Wynants- 

 kill, Rensselaer County, N. Y. (L. M. Prindle, 1893). 

 Obolus prindlei. 



3381 [U. S. National Museum]. (See 39a.) Lower Cambrian: Limestone in the northern part of 'dlaston, 3 miles 

 (4.8 km.) south of Greenwich, Cambridge quadrangle (U. S. G. S.), Washington County, N. Y. 

 Lingulella granvillensis. 



338m [U. S. National Museum]. Lower Cambrian: Limestone on the roadside north of schoolhouse No. 4, in the 

 northeast part of Whitehall, Whitehall quadrangle (U. S. G. S.), Washington County, N. Y. 

 Lingulella granvillensis. 



338n [U. S. National Museum]. Lower Cambrian: Western belt of conglomeratic limestone, Rensselaer County, 

 N. Y. 

 Yorkia washingtonensis, 

 Microdiscus lobatus (Hall). 



3380 [?]. Lower Cambrian: Shale on Moses Hill, 2 miles (3.2 km.) west of North Greenwich, near the line between 

 the Schuylerville and Cambridge quadrangles (U. S. G. S.), Washington County, N. Y. 

 Obolella crassa. 



338p [U. S. National Museum]. Lower Cambrian: Sandy limestone 0.25 mile (0.4 km.) northwest of schoolhouse 

 No. 7, in Greenwich, Cambridge quadrangle (U. S. G. S.), Washington County, N.Y. 

 Obolella chromatica. 



3385 [Hall, 1847,, p. 290]. Lower Cambrian: Calcareous beds 2 miles (3.2 km.) northeast of Troy, Troy quad- 

 rangle (U. S. G. S.), Rensselaer County, N.Y. 

 *Obolella crassa. 



338r [Billings, 1856, p. 34]. Upper Cambrian: Potsdam sandstone at Keeseville, Essex County, N. Y. 

 Lingulella (Lingulepis) acuminata. 



338s [Emmons, 1842, pp. 267 and 268]. Upper Cambrian: Potsdam sandstone at High Bridge, on Ausable River, 

 Essex County, N. Y. 

 *Lingulella (Lingulepis) acuminata. 



338t [U. S. National Museum records]. Upper Cambrian: Potsdam sandstone in Ausable Chasm, below Keese- 

 ville, Essex County, N. Y. 

 Lingulella prima. 

 Ijingulella (Lingulepis) acuminata. 



338u [U. S. National Museum records]. Ordovician and Upper Cambrian: In the strata from the upper layers of 

 the Potsdam sandstone to the lower portion of the "Calciferous sand rock" at Chateaugay Falls, Franklin 

 County, N. Y. 

 Lingulella (Lingulepis) acuminata (associated with Ophileta complanata in the upper beds). 



338v [U. S. National Museum]. Ordovician: Shale 1 mile (1.6 km.) southwest of Middle Granville, Mettawee 

 quadrangle (U. S. G. S.;, Washington County, N. Y. 

 *OboIus sp. undt. a. 



