260 CAMBRIAN BRACHIOPODA. 



326f (references follow species). Lower Cambrian: One-half mUe (0.8 km.) south of North Weymouth [Burr, 

 1900, p. 42], Norfolk County, Mass. 

 Obolella atlantica [Burr, 1900, p. 47]. 

 Obolella sp. [Burr, 1900, p. 48]. 

 Olenellus (Holmia) broggeri [Burr, 1900, p. 43]=Callavia 



crosbyi Walcott. 

 Olenellus (Mesonacis) asaphoides [Burr, 1900, p. 45]=Cal- 



lavia crosbyi Walcott. 

 Olenellus sp. [Burr, 1900, p. 45]=Callavia burri Walcott. 



Metadoxides magnificus? [Burr, 1900, p. 46]=Callavia 



crosbyi Walcott. 

 Agraulos (Strenuella) strenuus nasutus [Burr, 1900, p. 46]. 

 Microdiscus cf. helena [Biur, 1900, p. 47]. 

 Leperditia cf. solitaria [Burr, 1900, p. 47]. 

 Urotheca pervetus [Burr, 1900, p. 48]. 

 Orthotheca cylindrica [Burr, 1900, p. 48]. 



326g (references follow species). Lower Cambrian: Limestones at East Point, Nahant, Essex County, Mass. 

 Micromitra (Paterina) bella [Grabau, 1900, p. 618]. 

 Obolella crassa [Grabau, 1900, p. 620]. 



327 [U. S. National Museum]. Upper Cambrian: Arenaceous limestone east of Gold Camp, Caballos Mountains, 



Sierra County, N. Mex. (W. T. Lee, 1905). 

 Obolus since. I Lingulella acutangula?. 



Obolus sinoe?. . Eoorthis desmopleura. 



Obolus (Westonia) stoneanus. I 



327a [U. S. National Museum]. Upper Cambrian: Arenaceous limestone about 500 feet (152 m.) above the base 

 of the, Cambrian, in McKinley Canyon, Caballos Mountains, Sierra County, N. Mex. (W. T. Lee, 1905). 

 Obolus (Westonia) stoneanus. 



327b [U. S. National Museum]. Upper Cambrian: Arenaceous limestone near the base of the section on the south 

 side of Cerro Cuchillo, Caballos Mountains, Sierra County, N. Mex. (W. T. Lee, 1905). 

 Obolus (Westonia) stoneanus. 



327c [U. S. National Museum]. Upper Cambrian: Arenaceous limestone in the Caballos Mountains, Sierra County, 

 N. Mex. (W. Lindgren, 1905). 

 Obolus (Westonia) stoneanus. 



328 [Whitfield, 1882, p. 172]. Upper Cambrian: Upper layers of the "St. Croix sandstone" near the north end of 



Devils Lake, Sauk County, Wis. 

 *Syntrophia barabuensis. 



328a [U. S. National Museum]. Upper Cambrian: "St. Croix sandstone" 4 miles (6.4 km.) north of Winfield, 

 Jefferson County, Wis. 

 Lingulella simUis. 



328b [Sardeson, 1896, p. 95]. Upper Cambrian: St. Lawrence formation at Osceola, Polk County, Wis. 

 Obolus (Westonia) aurora. 



328c [U. S. National Museum]. Upper Cambrian: "St. Croix sandstone" at Alma, Buffalo County, Wis. 

 Dicellomus pclitus. 

 Billingsella coloradoensis. 

 Ptychoparia diademata (Hall). 



328d [Whitfield, 1882, p. 171]. Upper Cambrian: "St. Croix sandstone " at Berlin, Green Lake County, Wis. 

 Billingsella coloradoensis. 



328e [U. S. National Museum]. Middle Cambrian: "St. Croix sandstone " at St. Croix Falls, Polk County, Wis, 

 (See p. 159.) 

 Obolus matinalis. 

 Lingulella (Liagulepis) acuminata. 

 *Acrotreta signalis. 



328f [Hall, 1863, p. 128]. Upper Cambrian: Sandstone at the falls of St. Croix River, Polk County, Wis. 

 Obolus (Westonia) stoneanus. 



328g (references follow species). Middle Cambrian: "St. Croix sandstone," Wisconsin shore of Mississippi River, 

 near Trempealeau, Trempealeau County, Wis. (See p. 159.) 

 Lingulella ampla (U. S. National Museum). Conocephalites chippewaensis [Hall, 1863, p. 134]. 



Dicellomus politus [Hall, 1863, p. 134]. Hyolithes primordialis [Hall, 1863, p. 134]. 



Conocephalites iowensis [Hall, 1863, p. 134]. 



32811 [Owen, 1852, p. 583,andU.S. National Museum], Upper Cambrian: Silico-calcareous layers of FlbofOwen's 

 ' section at the falls of the St. Croix, Polk County, Wis. 

 *Obolus matinalis. 

 Lingulella (Lingulepis) acuminata. 



