wHfTEAVES.] FOSSILS OF HAMILTON FORMATION OF ONTARIO. 393 



found, SO far as the writer is awaro, by any local collector in the Hamil- 

 ton formation of Ontario. In the Museum of the Survey there are two 

 specimens labelled with the name of this species, and as having been 

 collected by Mr. llobb near Thedford, but it is doubtful whether either 

 of them is the specimen figured by Mr. Billings. One of them has the 

 surface so much worn that the finer surface markings are obliterated, and 

 the other looks as if it had been treated with acid. Either of them might 

 as well be referred to Spirifera granulosa (Conrad) as to S. Parryana. 



SpiniFERA AUDACULA, Conrad. (Sp.) 



Dcltliiiris aiidncnla, Conrad. 1842. Joiini. Ac. Nat. go. Philad., vol. VITI., jj. 262. 



De!thi:ris mcidiih's, Hull. 1S4.S. Geol. N. Yoik, Rep. Fourth Distr., p. 208, fig. 8. 



Sijirifrr Eatoni, Hall. 1857. Tenth Rep. N.Y. St. Cab. Nat. Hist., p. 157. 



Spinfer uu'llnli^. Hall. 1857. Ibid., p. 1G4, fig. 1. 



DiUhiirh iii(:iliaJi^, Rogers. 1858. Geol. Pennsylv., \-ol. II., i>t. 2, p. 828, fig. (169. 



Spirifera meilialix. Hall. 1867. Pal. N. York, vol. IV., p. 227, pi. .38, figs. 1-25. 



Spirifera tncili'iii.^. var. Eatoni. Hall. 1807. Ibid., pi. 38, figs. 12-lS. 



Spirifera andetcida, \Vhitfield. 1882. Geol. Wiscons., vol. IV., p. 329, pi. 25, figs. 25 



and 2(1. 

 Spvrifern mediiilis. Hall. 18S;i. Second Ann. Rep. N.Y.St. Geologist, pi. 54, figs. 1-13. 

 Nettelroth. 1889. Kentucky Fossil Shells, ilem. Kent. (renl. 

 Surv,, p. 125, pi. 26, figs. 2-5. 

 Spirifcr ,nujae,du^, Hall and Clarke. 1893. Pal. N. York, vol. VIII., pt. 2, pp. 29, 30 

 and 31, pi. 24, figs. 1-13 ; and pi. 29, fig. 5. 



Two larc-e ventral valves, which appear to be referable to this species, 

 were collected at Bartlett's ^MiUs by Dr. H. M. Ami in 1883, and more 

 recently, two small but perfect specimens of the same shell have been 

 collected at Thedford, one by th" Rev. Hector Currie and the other by 

 Mr. Kernahan. 



Spirifera divaricata, Hall. 



Spiriferd'rarieai'i. Hall. IS.'w. Tenth Re|.. N.Y. St. Cab. Nat. Hist., p. 133. 

 Spirifera divaricata, Hall. ]sii7. I'al. N. York, vol. IV., j). 213, pi. 32, figs. 1-0. 



„ I, Nettelroth. 1889. Kentiicky Fossil Shells, Mem. Kent. Geol. 



Surv., |.. 113, ij1. 11, figs. 6-11 ; j.l. 12, figs. 5-11. 

 Spirifn- diraricedus. Hall and Clarke. 1893. Pal. N. York, vol. VIII., pt. 2, pp. 24, 27, 

 39, pi. .38, tigs. 15-17. 



Thedford, G. Kernahan, 1897: one large and characteristic specimen 

 which he has kindly presented to the Museum of the Survey. 



Delthyris consobeina, d'Orbigny. (Sp.) 



Delthurn: :/>:«<', H.all (non Roeiner). 1843. fieol, N. Y., Rep. Fourth Distr., p. 200, fig. 

 Spirifera. eonsobrina, eVOrhigny. 1850, Prod r. Paleont., vol I., p. i)8, 

 Spirifera -J.r.ac, HIall. 1807. Pal. N. York, vol. IV., p. 222, pi. 35, figs. 15-23. 



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