Maryland Geological Survey 323- 



Occurrence. — TIeldehberg Forjiation, Coeymans Me:mber. Keyser, 

 West Virginia; Dawson, Corriganville, Devil's Backbone, Maryland. 

 New Scotland Member. Dawson, Corriganville, Devil's Backbone, 

 Millers Spring near Cumberland. 



Collection. — Maryland Geological Survey. 



Strophonella punctulifera (Conrad) 

 Plate LIX, Figs. 8-10 



Leptfvna p^cnctnlifcra Conrad, 1838, Second Rept. N. Y. State Geol. Surv. 



p. 117. 

 Strophomena punctulifera Vanuxem, 1842, Geol. N. Y., Kept. Third Dist., p 



122, fig. 5. 

 Strophomena (Strophodontn) punrtulifera Hall. 1857, Tenth Ann. Rept 



N. Y. State Cab. Nat. Hist., p. 50, fig. 1. 

 Strophodonta cavumbona Hall, 1857, Tenth Ann. Rept. N. Y. State Cab. Nat 



Hist, p. 51. 

 Strop?iomena punctulifera Rogers, 1858, Geol. Penn., vol. ii, pt. ii, p. 825, fig, 



648. 

 Strophodonta punctulifera Hall, 1859, Nat. Hist. N. Y., Pal., vol. iii, p. 188 



pi. xxi, fig. 4; pi. xxiii, figs. 4-7. 

 Strophodonta cavumbona Hall, 1859, Nat. Hist. N. Y., Pal., vol. iii, p. 187, pi. 



xxi, figs. 1-3, 1861. 

 Strophomena punctulifera Billings, 1863, Proc. Portland Soc. Nat. Hist., p 



108, pi. ill, fig. 2. 

 Strophomena pinn I ulifcra Billings, 1863, Geol. Canada, p. 957, fig. 448. 

 Strophomena juniri .iJifrru Billings, 1874, Pal. Foss., vol. ii, p. 31, pi. iii, fig. 2 

 Strophonella piitui ulifcra Hall, 1879, Twenty-eighth Rept. N. Y. State Mus, 



Nat. Hist., p. 154. 

 Strophonella punctulifera Hall, 1883, Second Ann. Rept. N. Y. State Geol.; 



pi. xliii, figs. 10-12. 

 Strophodonta punctulifera Walcott, 1884, Mon. U. S. Geol. Surv., vol. viii 



p. 121, pi. xiii, fig. 10. 

 Strophonella punctulifera Hall and Clarke, 1892, Nat. Hist. N. Y., Pal., vol 



viii, pt. i, p. 292, pi. xii, figs. 10-12. 

 Strophonella cavumbona Hall and Clarke, 1892, Nat. Hist. N. Y., Pal., vol 



viii, pt. i, pp. 291-292. 

 Strophonella punctulifera Weller, 1903, Geol. Surv. N. J., Pal., vol. iii, p. 277; 



pi. xxvii, figs. 6-8; p. 301, pi. xxxiii, fig. 9. 



Description. — "Shell with the upper valve deeply concave; radiating 

 >triai very numerous, prominent, angulated, each with a series of very 

 regular small elevated punctas. Length, 2 inches. Locality, Helderberg 

 Mountain." Conrad, 1838. 



