Ling. 348 



Note. I. 0. White in the Montour region, G7, p. 57, 65, 238, 

 240, finds it in Catskill- Chemung transition leds^ IX- VIII ; 

 in beds No. 25, 35 and 54, of the Oauawissa section, Columbia 

 county, Pa. — IX, 



Lingula striata and another Lingula found by Emmons 



in the light friable shales of Vir- 

 ginia (rocks of low uncertain 

 age), with Orbicula excentrica^ 

 \ £yii KjG r'."''^, s ^^SKUKP^-^j^ etc. Am. Geol, I, ii, p. 112, pi. 



'■' 1, figs. 17 (and 9).—/? 

 Lingula trentonensis, Conrad. Jour. Ac. Nat. Sci. Phil. 

 Vol. 8, 1845, Trenton. See Report T on Blair Co., p. 55— //(?. 

 Note. This may be the Lingula (excellent specimen) 203-11 

 A, of C. E. Hall's coll. at Bellefonte in 1875. On the same 

 piece is a poor head of Trinucleus concentricus ; on the reverse 

 side, fragments of Ghcietetes and Tentaculites, — lie. — See Ap- 

 pendix. 



Lingula triquetra. Clarke, Bull. 16, U. S. G. S. 1885, p. 

 . 62, pi. 3, fig. 11, natural sizex somewhat re- 

 sembles Ling. Icena^ Hall and Zing, palcefor- 

 mis., Hall, of the Hamilton shales, but is 

 shorter than the Imna., and narrower in front 

 cik B.I6. 3 i\i2in palceformis^ and without ray lines. — 



Found in the Naples ( Upper Genesee) black shales of Ontario 

 Co., N. Y.— VIIIe. 

 Lingula umbonata, Cox. Geolog. Survey of Kentucky, Vol. 

 3, 1857, page 576; plate 10, fig. 4. Collett's Indi- 

 ana Keport of 1883, page 120, plate 25, fig. 14, sin- 

 . gle valve, natural size. — Coal measures of Vermil- 



^W lion Co., Ind. Cox's specimen from the coal meas- 

 Inct.MS J?S ^^^5 south of the Ohio rivor. — XIII. 



Lingula ? Rogers, Geol. Pa. 1858, p. 816, 817, from 



the Potsdam sandstone. I. — About a dozen specimens, not iden- 

 tifiable, were got in 1875 from J. Schadt's quarry, i m. N. W. of 

 Helfricht's spring, where the Jordan sinks, in Lehigh County, 

 in a Lower Silurian formation below the Trenton. See DD, p. 22. 

 //. — A Lingula poorly preserved, is the only fossil to be 

 seen in the Lower Salina {Bloomslurg red) shale formation at 

 Chulasky furnace, Northumberland Co., but is in great numbers 

 in bed 2 of the section ; G7, p. 107. 341, 342. V g. — A Lingula 



