382 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



HeDEKELLA MAGNA, Hall. 



HedereUa -nrngna. Hall. 1881. Trans. Albany Inst., vol. X., p. 195. 

 M 11 ,, 1884. Rep. State Geul. for 1883, p. 5,5. 

 1887. Pal. N. York, vol. VI., p. 280, pi. 05, fig. 15. 



Thedford, in the "Middle third of the section", C. Schuchert 1895 : one 

 specimen which was collected and determined by Mr. Schuchert. It 

 is No. 26,576 of the "United States National Museum Catalogue of 

 Invertebrate Fossils. 



BRACHIOPODA. 



Stropheodonta flicata, Hall. 



StroiJhodonta plicata, Hall. 1860. Thirteenth Rep. N. Y. St. Cab. Nat. Hist., p. 90. 

 „ 1867. Pal. N. York, vol. IV., p. 114, pi. 63, figs. 30-32. 

 Whiteaves, 1889. This vol., pt. 2, p. 114. 

 ,. M Nettelroth, 1889. Kentucky Fossil Shells, Mem. Kent. Geol. 



Surv., p. 149. 

 Comp.StropliodontaCOcostata, Owen. 1852. Rep. Geol. Surv.Wiscons., Iowa, and Minn. 



p. 58,5, pi. 3, figs. 11 & 11 a; k pi. 3 A., fig. 5. 

 Comp. also Tropidolcptus occidens, Hall. 1860. Thirteenth Rep. N.Y. St. Cab. Nat. 



Hi.st., p. 91. 



H.%11. 1867. Pal. N. York, vol. IV., p. 408, pi. 

 01 A, figs. ,50-52. 



Hall and Clarke. 1895. Pal. N. York, vol. VIII., 

 pt. 2, pi. 82, fig,9. 37 & 38. 



A few additional specimens of S. plicata have been obtained at Thed- 

 ford by local collectors since 1889. It is highly probable, as suggested 

 by Mr. Schuchert and as indicated in the foregoing synonymy, that S. 

 plicata is the same shell a,« iS'. costata, Owen, and Tropidoleptus occAdens, 

 Hall. If so, the species now under consideration must of course be called 

 6'. costata, Owen, which was described in 1852, rather than S'. plica/a, or 

 T. occidens, both of which were described eight years later. Owen's de- 

 scription and figures of S. costata, however, are very vague and unsatis- 

 factory, being based upon a specimen only three-eighths of an inch in 

 its greatest diameter, though it should not be forgotten that the original 

 type of S. jjlicata is described as a " little more than half an inch in 

 length," with the "length and width nearly equal." 



Pholidostrophia lowENSis, Owen. (Sp.) 



Cfwnetes CO /"o^cen-siSj^Owen. 1852. Rep. Geol. Surv. Wiscons., Iowa and Minn., p. 



584, pi. 3 A, fig. 7. 

 Strojihomena f Stropkodonta ) nacreu. Hall. 1857. Tenth Rep. N. Y. St. Cab. Nat- 



Hist., p. 144. 

 Strophomena lepida. Hall. 1858. Geol. Rep. Iowa, vol. I., pt. 2, p. 493, pi. 3, figs. 3, a-c. 

 u II Billings. 1861. .Toum. Ganad. Inst., New Series, vol. VI., p. 344. 



Strophodonta nacrea. Hall. 1867. Pal. N. York, vol. IV., p. 104, pi. 18, figs. ] a-h. 



