176 CAMBRIAN BRACHIOPODA. 



lOh. (For stratigraphic position and association, seep. 131.) Upper Cambrian : Shale on small east branch of Bara- 

 chois River, 0.75 mile (1.2 km.) north of the crossroad from Boisdale to Upper Leitches Creek, eastern Cape 

 Breton, Nova Scotia (S. W. Loper, 1901). 

 Lingulella concinna. | Acrotreta bisecta. 



Schizambon priscus. | Orusia lenticularis. 



lOi. (For stratigraphic position and association, see p. 131.) Upper Cambrian: Shale in high bank on west side 

 of Barachnis River, just north of the Boisdale road, eastern Cape Breton, Nova Scotia (S. W. Loper, 1901). 

 Obolus (Broggeria) salteri. I Schizambon priscus. 



Lingulella concinna. | Acrotreta convexa. 



10k (50 feet above 10c). (For stratigraphic position and association, see p. 131.) Upper Cambrian : Shale on west 

 bank of Barachois River, about 0.25 mile (0.4 km.) north of the Boisdale road, eastern Cape Breton, Nova 

 Scotia (S. W. Loper, 1901). 

 Schizambon priscus. 



101. (For stratigraphic position and association, see p. 131.) Upper Cambrian: Shale on east bank of Barachois 



River, 6 miles (9.6 km.) from Little Bras d'Or Lake, eastern Cape Breton, Nova Scotia (S. W. Loper, 1901). 



Obolus (Broggeria) salteri. 



Lingulella concinna. 



Schizambon priscus. 



Acrotreta bisecta. 

 Acrotreta convexa. 



10m (see 372a). (For stratigraphic position and association, see p. 131.) Upper Cambrian: Shales 2 miles (3.2 km.) 

 south of the Boisdale road from Upper Leitches Creek, toward the head of Barachois River, eastern Cape 

 Breton, Nova Scotia (S. W. Loper, 1901). 



Obolus (Broggeria) salteri. 



Lingulella concinna. 



lOn. (For stratigraphic position and association, see p. 131.) Upper Cambrian: Shale in ravine on east side of 

 Barachois Glen, 3 miles (4.8 km.) from Barachois, eastern Cape Breton, Nova Scotia (S. W. Loper, 1901). 

 Obolus (Broggeria) salteri. 

 Lingulella concinna. 

 Acrotreta bisecta. 



lOo. (For stratigraphic position and association, see p. 132.) Middle? Cambrian: Arenaceous shales in the railroad 

 cut on the shore of Bras d'Or Lake, at Barachois, eastern Cape Breton, Nova Scotia (S. W. Loper, 1901). 

 Obolus (Westonia) escasoni?. 



lOp (a little below lOq ; see 344o). (For stratigraphic position and association, seep. 134.) Middle Cambrian: 

 Sandstone just below the waterfall in Division B2b of Matthew's [1903, p. 21] Etcheminian, Dugald Brook, 

 Indian River, eastern Cape Breton, Nova Scotia (S. W. Loper, 1901). 



Obolus (Palseobolus) bretonensis. 



Lingulella atava. 



Lingulella collicia. 



Lingulella triparilis. 



Lingulella sp. 



Lingulella (Lingulepis) gregwa. 



Lingulella (Lingulepis) gregwa robusta. 



Lingulella (Lingulepis) longinervis. 



Acrothele avia. 



Acrotreta gemmula. 



Acrothyra proavia. 



Acrothyra sera. 



Acrothyra signata. 



Acrothyra signata orta. 



*Protorthis (Loperia) dugaldensis. 



Matthew [1903, p. 25] gives the following as occurring in Division 2b: 

 Acrothyra signata tarda=Acrothyra sera. I Orthotheca. 



Lingulepis longinervis. | Bradorona perspicator magna Matthew. 



Bassler cites the following from this locality: 

 Bradoria acuta (Matthew). 

 Bradoria benepuncta (Matthew). 

 Bradoria ovalis (Matthew). 



Bradoria perspicator (Matthew) ss. 

 Bradoria robusta (Matthew). 

 Bradoria spectator (Matthew). 



lOp'. (For stratigraphic position and association, see p. 134.) Middle Cambrian: Sandstone 0.25 mile (0.4km.) 

 from lower bridge, on Gregwa Brook, Indian River, eastern Cape Breton, Nova Scotia (S. W. Loper, 1901). 

 Lingulella (Lingulepis) gregwa. I Lingulella (Lingulepis) longinervis. 



Lingulella (Lingulepis) gregwa robusta. | Acrothyra sera. 



