LOCALITIES. 265 



337d [Schmidt, 1861, p. 218]. (For stratigraphic position and association, see p. 143.) Ordovician: "Brandschie- 

 fer" at Salla, near Erras, 85 miles (137 km.) east of Reval, Government of Esthonia, Russia. 

 Siphonotreta unguiculata. 



337e [Schmidt, 1861, p. 218]. (For stratigraphic position and association, seep. 143.) Ordovician: "Jewesche- 

 Schicht" at Altenhof, near Poddrus, 55 miles (88.6 km.) oast of Reval, Government of Esthonia, Russia. 

 Siphonotreta unguiculata. 



337f [Schmidt, 1861, pp. 218 and 248]. (For stratigraphic position and association, see p. 143.) Passage beds 

 between the Upper Cambrian and the Ordovician: Orihoceratite limestone ("Vaginatenkalk") at Tursel, 

 15 miles (24.2 km.) west of Narwa, Government of Esthonia, Russia. 

 Siphonotreta verrucosa. 



337g [Schmidt, 1861, pp. 218 and 248]. (For stratigraphic position and association, see p. 143.) Passage beds 

 between the Upper Cambrian and the Ordovician: Orthoceratite limestone ("Vaginatenkalk ") at Chudleigh, 

 25 miles (40 km.) west of Narwa, Government of Esthonia, Russia. 

 Siphonotreta verrucosa. 



33711 [Eichwald, 1860, p. 929]. (For stratigraphic position and association, see p. 143.) Passage beds between the- 

 Upper Cambrian and the Ordovician: Orthoceratite limestone near Reval, Government of Esthonia, Russia. 

 Obolus (Acritis) antiquissimus. 



337i [Schmidt, 1861, p. 218]. (For stratigraphic position and association, see p. 143.) Passage beds between the- 

 Upper Cambrian and the Ordovician: "Green sand" at Baltischport, Government of Esthonia, Russia. 

 Obolus (Mickwitzella) siluricus. 



337] [Fr. Schmidt, personal communication, 1908]. (For stratigraphic position and association, see p. 143.) Ordo- 

 vician: Zone Bllla or BIII/3, characterized by Asaphus raniceps, a little above the zone with Asaphus 

 expansus, in the Orthoceratite limestone ^.t Obookhov (Obuchow), on Volkhof (Wolchow) River, Govern- 

 ment of St. Petersburg, Russia. 

 Volborthia recurva. 



3371s [Eichwald, 1860, p. 916]. (For stratigraphic position and association, see p. 143.) Passage beds between the- 

 Upper Cambrian and' the Ordovician: Orthoceratite limestone on the banks of Volkhof (Wolchow) River, 

 near Lake Ladoga, near St. Petersburg, Russia. 

 Siphonotreta unguiculata. 



337 1 [Eichwald, 1860, p. 916]. (For stratigraphic position and association, see p. 143.) Passage beds between th& 

 Upper Cambrian and the Ordovician: Orthoceratite limestone at Baltischport; west of Reval, Government of 

 Esthonia, Russia. 

 Siphonotreta unguiculata. 



337m [Eichwald, 1860, p. 916, and U. S. National Museum]. (For stratigraphic position and association, see p. 143.) 

 Passage beds between the Upper Cambrian and the Ordovician: Orthoceratite limestone at Popowka, near 

 St. Petersburg, Russia. 



Siphonotreta unguiculata. 



Siphonotreta verrucosa. 



338 [U. S. National Museum]. (See 29a.) Lower Cambrian: Limestone at Schodack, northeastern corner of Cox- 

 sackie quadrangle (U. S. G. S.), Rensselaer County, N. Y. 

 Acrotreta sagittalis taconica. 



338a [U. S. National Museum]. Lower Cambrian: Limestone in the northeast section of 'WTiitehall township,. 

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

 Acrotreta sagittalis taconica. 



338b [U. S. National Museum]. (See 29.) Lower Cambrian: Limestone on Kinderhook Creek, near Stock- 

 port paper mill, Kinderhook quadrangle (U. S. G. S.), Columbia County, N. Y. 

 Acrotreta sagittalis taconica. 



338c [U. S. National Museum]. (See 33.) Lower Cambrian: Limestone at Rock Hill schoolhouse, near North 

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

 Acrotreta sagittalis taconica. 



338d [U. S. National Museum]. (See 36; may be same locality.) Lower Cambrian: Limestone 1 mile (1.6 km.) 



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



Acrotreta sagittalis taconica.) „, . . , , , 



T,.„. 11 , . t Ihese species may not occur m the same bed. 



Bilhngsella salemensis. J 



338e [U. S. National Museum]. Lower Cambrian: Limestone a little west of North Greenwich, Cambridge quad- 

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

 Acrotreta sagittalis taconica. 



