262 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 57 



Upper Cambrian: (99c) "St. Croix sandstone," near banks of 

 Lemon-weir River, 4 miles (6.4 km.) north of New Lisbon, 



Wisconsin. 



LINGULELLA PRIMA (Conrad MS.) (Hall) 



Plate 41, figs. 8-1 1 



Lingula prima (Conrad MS.) Hall, 1847, Nat. Hist. New York, Paleon- 

 tology, Vol. I, p. 3, pi. I, fig. 2. (Described and discussed.) 



For the synonymy of this species up to 1912, see Monograph 51, 

 U. S. Geol. Survey, p. 526. (In press.) 



An extended description and illustration of Lingulella prima are 

 given in Monograph 51, pp. 526-527, pi. 27, figs, i, la-c. (In press.) 



Formation and locality. — Upper Cambrian: (77)^ Potsdam sand- 

 stone near the water below the falls at the high bridge, and also at 

 several horizons in the section, the highest point being 70 to 75 feet 

 (21 to 23 m.) above the water, in Ausable Chasm; (sGyf) sandstone 

 at French Creek, i mile (1.6 km.) east of Keeseville ; (367g) sand- 

 stone in the bed of the brook, in the suburbs of Port Henry ; (367h) 

 Rosse Bridge, 4 miles (6.4 km.) west of Essex; (136) Potsdam 

 sandstone in bank of stream opposite the first Y on the Port 

 Henry and Maine Railroad out of Port Henry ; and (338t) Potsdam 

 sandstone in Ausable Chasm, below Keeseville ; all in Essex County, 

 New York. 



LINGULELLA (LINGULEPIS) ACUMINATA (Conrad) 



Plate 42, figs. 1-7 



Lingula acuminata Conrad, 1839, Third Ann. Kept. New York State Surv., 

 p. 64. (Described as a new species.) 



For the synonymy of this species up to 1912, see Monograph 51, 

 U. S. Geol. Survey, p. 545. (In press.) 



An extended description and discussion of this species are given in 

 Monograph 51, that include its geographic and stratigraphic distri- 

 bution and a large number of illustrations. 



It occurs in the Upper Cambrian, both in the Hoyt limestone (76) 

 and the Potsdam sandstone (76a) in Saratoga County, New York. 



Formation and locality. — For these see Monograph 51, pp. 548-550. 

 (In press.) 



^ 77 is the type locality, though the specimens to which that number is 

 assigned in the United States National IMuseum were collected later than the 

 type specimens. 



