246 CAMBRIAN BEACHIOPODA. 



313d [U. S. National Museum]. (Compare 313a and 313f.) (For stratigraphic position and association, see p. 139.) 

 Lower Ordovician: Limestone at Schellboume, Schell Creek Range, White Pine Comity, Nev. 

 *OboluslvtiiBdatu3. 



313e [U. S. National Museum]. (For stratigraphic position and association, see p. 139.) Middle Cambrian: Lime- 

 stone 2 miles (3.2 km.) west of Green's ranch, White Pine County, Nev. (0. H. Hershey). 

 Lingulella arguta. 

 Linnarssonella girtyi, 



313f [U. S. National Museum]. (Compare 313a and 313d.) (For stratigraphic position and association, see p. 139.) 

 Upper Cambrian: Limestone at Schellboume, Schell Creek Range, White Piae County, Nev. 

 *Lingulella arguta. 1 



*Lingulella manticula. [These species are probably from more than one horizon. 

 *Acrotreta pyxidicula.J 



313g [U. S. National Museum]. (For stratigraphic position and association, see p. 158.) Lower Cambrian: Lime- 

 stone at the southern end of the Timpahute Range, Groome district, near the line between Nye and Lin- 

 coln counties, Nev. 



*Nisusia (Jamesella) erecta. 



Billingsella sp. 



Callavia nevadensis Walcott. 



Olenellus fremonti Walcott. 

 Peachella iddingsi (Walcott). 



313h [U. S. National Museum]. (For stratigraphic position and association, see p. 139.) Upper Cambrian: Sandy 

 shale on Hamburg Ridge, Eureka district [Hague, 1892, Atlas], Eureka County, Nev. 

 *Linnarssonella minuta. 



313i [U. S. National Museum]. (For stratigraphic position and association, see p. 138.) Lower Cambrian: Lime- 

 stone collected at long. 117° 20' W., lat. 38° N., in the western part of Esmeralda County, Nev. 

 Kutorgina perugata. 



313j [Hall and Whitfield, 1877, pp. 205 and 206]. (Specimens in U. S. National Museum.) (For stratigraphic 

 position and association, see p. 139.) Upper Cambrian: Limestone in the Eureka district [Hague, 1892, 

 Atlas], Eureka County, Nev. 

 *Obolus discoideus. 

 *Obolus msera. 



These species, in all probability, did not occur together; Hall and Whitfield give no further data, however, 

 concerning their occurrence. 



313k [U. S. National Museum]. (See 214a and 214b.) (For stratigraphic position and association, see p. 139.) 

 Ordovician: Limestone in the T^Tiite Pine district. White Pine (?) County, Nev. 

 Linnarssonella minuta. 



314 (references follow species). (For stratigraphic position and association, see p. 140.) Middle Cambrian: Lime- 

 stone in Paradoxides zone. Chappie Arm, Trinity Bay, Newfoundland. 



*Acrotreta misera [Billings, 1872b, p. 470]. 

 *Agraulos socialis [Billings, 1872b, p. 472]. 

 *Solenopleura communis [Billings, 1872b, p. 474]. 



*Anapolenus venustus [Billings, 1872b, p. 474]. 

 *Paradoxides tenellus [Billings, 1872b, p. 476], 

 *Paradoxides decerns [Billings, 1872b, p. 476]. 



314a [Whiteaves, 1878, p. 226]. (For stratigraphic position and association, see p. 140.) Upper Cambrian: Shales 

 on Kelleys Island, Conception Bay, Newfoundland. 

 *Lingulella billingsiana. 



314b [Matthew, 1899e, p. 97]. (For stratigraphic position and association, see p. 141.) Lower Cambrian: Upper 

 limestone of Matthew's Etcheminian at Smith Sound, Trinity Bay, Newfoundland. 

 *Kutorgina granulata. 



314c [Billings, 1865a, p. 220]. (For stratigraphic position and association, see p. 140.) Lower Ordo^^cian: Nodules 

 of white limestone belonging to Division P of Billings's section at Cow Head, Newfoundland. 

 Syntrophia calcifera. 

 Bathyurus saffordi. 



