WHiTEAVEs. J FOSSILS OF HAMILTON FORMATION OF ONTARIO. 395 



AtHYRIS SPIRIFEROIDES, Eatoil. (Sp ) 



Terehratula spiriferoidcs, Eaton. 18.31. Am. .louni. So. and Arts, vol. XXI., p. 137. 



1832. Geolo--ic.il Te.xt-book, p. 10. 

 Atriipa eonccHtrioi, Conrad. 1838. Ann. Rep. Geol. Sui-v. New York, p. 111. 



Hall. 1843. (ieol. X. York, Rep. Fourth Distr., p. 198, tig. 5. 

 Spirifci-a spiri/eroiilcs, Hall. 1S57. Tenth Rep. N. Y. St. Cab. Nat. Hrst., p. 1.53, 



figs. 1 and 2. 

 Athiiris spiriferoiJKS, Hall. 1860. Thirteenth do., p. 93, figs. 1-4. 

 Spirigera conccntrica, 'BiWings. 18G1. Canad. .Tourn., vol. VI., p. 14.5,'figs. 54 and 55 ; 



and p. ]4fi, figs. 50 and 57. 

 Athijris spirifrroidcH, Hall. 1802. Fifteenth Rep. N. Y. St. Cab. Nat. Hist., p. 180, 



figs. 1-4. 

 Spirigera concentriea, Billings. 1863. Geol. Canada, p. 373, fig. 379 ; and p. 385, figs. 



421, a-e. 

 Athiiris spiriferoidcs. Hall. 1867. Pal. N. York, vol. IV., p. 285, pi. 46, fig,9. 5-31. 

 Spirigera spiriferoides, X'icViolson. ]874. Rep. Pal. Prov. Ont., p. 85. 

 Athiiris spiriferoidcs, Hall and Clarke. 1893. Pal. N. York, vol. VIII., pt. 2, p. 89, 

 figs. 60 and 61 ; and pi. 45, figs. 11-27. 



The coaimon Athijris or Merintdla of the Hamilton shales of Ontario was 

 identified with the A. concentriea of European authors in 1861 by E. 

 Billings, who called it Spirigera concentriea. In 1867 Professor Hall 

 identified Canadian specimens of the same shell with A. spiriferoides. Mr. 

 Billings was under the impression that A. concentriea was described by 

 Bronn, in 1829, under the name Terehratula concentriea, in accordance 

 with the statement made by Bronn himself on page 1233 of the second 

 volume of his " Index Palajontologicus.'' Davidson, however, in the 

 synonymy of that species in his monograph of British Devonian Brachi- 

 opoda, says that Terehratula concentriea, was first described by Von Buch 

 in 1839, and definitely accepts that year as the date of its publication. 

 If Davidson's conclusion is correct, it follows that, whether the American 

 fossil be identical with the European species or not, the name A. spiri- 

 feroides has eight years priority of date over A. concentriea. Mr. 

 Sohuchert thinks that all the small specimens from Thedford and 

 Bartlett's Mills should be referred to Athyris Fultonensis, Swallow { = A. 

 vittata, Hall) and that only the larger ones are A. spiriferoides. Professor 

 Hall says that the spires or spiral coils of the interior of A. vittata are 

 quite distinct from those of A. spiriferoides, but the writer has never seen 

 any specimen of an A thyris from Thedford or Bartlett's Mills in which any 

 portion of the internal spires is visible. 



Athyeis Fultonensis, Swallow. (Sp.) 



Spirigera fultonensis. Swallow. 1860. Trans. St. Louis Ac. Sc, vol. I., p. 650. 

 Spirigera minima. Swallow. 1860. Ihid., p. 649. 



Athyris vittata, Hall. 1860. Thirteenth Rep. N.Y. St. Cab. Nat. Hist., p. 89. 

 Spirigera eborea, A. Winchell. 1866, Rep. Lower Peninsula Michigan, p. 94. 



3J 



