OBOLELLID.^. 605 



it was not until the study of Botsfordia Matthew was taken up that a satisfactory generic 

 reference was established. 



The shell appears to have been easily broken, as it is very difficult to obtain good specimens, 

 especially of the ventral valve. It was 10 years or more after I began collecting it before a 

 ventral valve was found showing the pedicle opening. In 1901 I described a young shell of this 

 species as Oholus {Lingulella) hicensis [Walcott, 1901, p. 688]. By comparison with other small 

 shells from the type locaHty at Troy, New York, I am satisfied that the Bic specimen is a young 

 shell of B. cselata. 



Botsfordia csdata is widely distributed in the Lower Cambrian rocks of the St. Lawrence 

 River, Lake Champlain, and Hudson River valleys, and it is one of the oldest of the Cambrian 

 brachiopods of the Atlantic province of eastern North America. 



At Troy, and in Wasliington County, New York, it is associated with the trilobites EUipto- 

 cepJiala asapTioides Emmons and Conocoryphe trilineata (Emmons) of the Lower Cambrian fauna, 

 and in the Georgia, Vermont, section it is 700 feet lower than Olenellus thomp$oni (Hall). 



Formation and locality. — Middle Cambrian: (308e [Matthew, 1895a, p. 126]) Beds of Division Clbl of Matthew's 

 11895a, p. 108] Protolenus zone, on Hanford Brook, St. John County, New Brunswick. 



Lower Cambrian: (2o) Limestone bowlders in conglomerate, on shore at east entrance to harbor at Bic; (8r) 

 limestone bowlders in a conglomerate in a cut on the Intercolonial Railway, 2 miles (3.2 km.) west of Bic railway 

 station; and (2p) limestone on south side of road a little west of Bic and half a mile (0.8 km.) west of the road leading 

 to the wharf; all in Rimouski County, Quebec, Canada. 



(392c) At the Straits of Belleisle, Labrador. 



(319j) Sandstone 50 feet (15 m.) above the base of the section west of Parker's quariy and about a mUe (1.6 km.) 

 irom the shore of Lake Champlain, in the township of Georgia, Franklin County, Vermont. 



(29a) Limestone 1 mile (1.6 km.) below the New York Central Railroad depot at Schodack; (2b) limestone just 

 north of Beman Park, in the northeastern part of the city of Ti-oy, Troy quadrangle (U. S. Geol. Survey); (367i 

 [Hall, 1847, P- 290\) shales near Troy; and (27) even-bedded and conglomerate limestones on the ridge in the eastern 

 suburb of Troy, Troy quadrangle (U. S. Geol. Survey); all in Rensselaer County, New York. 



(33) Limestone on the roadside near Rock Hill schoolhouse near North Greenwich, about 5 miles (8 km.) north- 

 northeast of Greenwich; (33b) limestone on M. C. Tefft's farm, 1.5 mUes (2.4 km.) east-southeast of North Greenwich, 

 about 5 mUes (8 km.) north-northeast of Greenwich; (36b) limestone near schoolhouse No. 12, near Greenwich; 

 (39a) limestone 0.25 ijiUe (0.4 km.) north of Easton Station, 3 mUes (4.8 km.) south of Greenwich; and (43a) limestone 

 1 mile (1.6 km.) east-northeast of Salem; all in the Cambridge quadrangle (U. S. Geol. Survey), Washington County, 

 New York. 



(34a) Limestone 1 mile (1.6 km.) west of North Hebron, 5 mUes (8 km.) south-southwest of Granville; (38) 

 limestone 0.25 mUe (0.4 km.) north of John Hulett's farmhouse about 3 mUes (4.8 km.) west of South GranvUle and 

 4.5 miles (7.2 km.) southwest of Granville; and (38a) limestone 2 mUes (3.2 km.) south of North Granville, on the 

 road which turns south from the road running between that vUlage and TruthvUle, 4 miles (6.4 km.) west-northwest 

 of GranvUle; all in the Fort Ann quadrangle (U. S. Geol. Sm-vey), Washington Coimty, New York. 



(38c) Shale at the slate quarries on the west side of the valley 1 mUe (1.6 km.) north of Middle GranvUle, Mettawee 

 quadrangle (U. S. Geol. Survey); (34) limestone on roadside a little west of the bridge over Poultney River at 

 Low Hampton, about 5 mUes (8 km.) east-northeast of Whitehall, Whitehall quadrangle (U. S. Geol. Survey); 

 (35) Limestones 1.5 mUes (2.4 km.) north of Bald Mountain and 3.5 mUes (5.6 km.) north-northwest of Greenwich, 

 SchuylervUle quadrangle (U. S. Geol. Survey); (35a) shaly limestone on the west slope of the summit of Bald Moun- 

 tain, 3 mUes (4.8 km.) north-northwest of Greenwich, SchuylervUle quadrangle (U. S. Geol. Survey); (338h) lime- 

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

 (U. S. Geol. Survey); and (39) limestone south of the Delaware and Hudson railroad track, on the road running south- 

 ■southwest from Low llampton, about 5 miles (8 km.) east-northeast of Whitehall, Whitehall quadrangle (U. S. Geol. 

 Survey); all in Washington County, New York. 



Botsfordia granulata (Redlich). 



Plate LVII, figures 4, 4a-r. 



Mobergia granulata Redlich, 1899, Mem. Geol. Survey India, Paleontologia Indica, new ser., vol. 1, No. 1: The 

 Cambrian fauna of the Eastern Salt Range, pp. 5-6, PL I, figs. 11-18. (The description and discussion of this 

 new species is incorporated with that of the new genus "Mobergia.") 



General form subcircular, with the ventral valve very obtusely acuminate, and the dorsal 

 -valve transversely more or less broadly oval. Ventral valve moderately convex with the 



