Ling. 344 



Lingula ? dawsoni, Walcott. Bulletin U. S. G. S. No. 10, 

 LC.8 d,S page 15, plate 5, fig. 8, ventral valve, enlarged foitr 

 - times. Middle Cambrian {Saint John) formation, 

 kT New Brunswick. (Somewhat like the Welsh Mene- 

 ' -^ vian Lingulella ferruginea of Salter, Mon. Br. Foss. 

 Davidson, Vol. 3,p.336).— Jf. C. See footnote to page 

 ISJ/. above. 



Lingula delia, Hall. i6th Reg. Rt. N., Y., 1863, Hamilton 

 upper beds. Specimen in Oarll & Randall's Chemung section 

 ^Warren, Pa. (0. E. Hall's Rt. 1875)— F/// g.—See Ap- 

 pendix. 



Lingula densa, Hall. Pal. N. Y. Vol. 4,1867, Hamilton up- 

 per beds. Found by 1. 0. White in the Montour district, Pa., 

 50' to 100' down in the Hamilton. G7, pp. 75, 229, 230.— 

 VIII (?.— Also in the Hamilton lower shale at the CofFee run 

 quarries for the RR. embankment, Huntingdon Co. T3, p. 171. 

 — VIII c. — See Appendix. 



Lingula elliptica. See Lingula perplexa. V a. 

 Lingula elongata, Hall. Pal. N. Y. Vol. 1, 1847, Trenton. 

 Emmons, American Geology, Vol. 1, part 2, page 202, 

 plate 8, fig. 5; shell oval, ends somewhat equal, but 

 hinge end narrower; concentric striae on the surface. 

 — Trenton limestone. II o. 



Lingula^'gibbosa, Hall. Trans.' Alb. Institute, Vol. 10, ab- 



.jess£i-j;rr'c ' stract, p. 13, 1879. Figure from Oollett's In- 



^^^^5. ^ diana Report of 1881, p. 284, plate 27, f. 2, ventral 



^^^^m YSilye.—Magara limestone, FJ.— Hall, Geology 



^UmPIr Fourth district, 1843, page 284, pi. 27, fig. 2. 



1ndj:»8i -Pi. 27. ventral valve of a specimen of this species. 



Lingula lamellata, Hall. Report of the Fourth (Western) 



Visa district of New York, page 100, fig. 38, 2, Cli?iton and 



' * * Niagara formations. Covered with concentric, 



slightly wavy, raised little plates {lamellm) wrinkled 



at the sides; beak sharp, low ; perfect examples rare ; 



no striae; Lockport, Rochester, etc.— F«, Vb. 



Lingula matthewi. See Appendix. — C. 



