123 



Murchisonia bicincta, Salter 1859. Geol. Surv, Canada, Canad. Org. 



Rem., Dec. 1, p. 19, pi. 4, figs. 5, 6 and 

 7. But not M. hicincta, McCoy. 



Mibrchisonia Milleri, Hall 1877. In first ed. of S. A. Miller's Amer. 



Palaeoz. Foss.. p. 244. 



Pleurotomaria bicincta (Hall) Lindstrom . . 1884. Sllur. Gastrop. and Pterop. Got- 

 land, p. 106, pi. 8, figs. 15-25. 



Lower beds, T. C. Weston, 1884 : five specimens which appear to be 

 referable either to this species, or possibly to M. modesta, Billings, from 

 the Hudson River formation of the Island of Anticosti. 



Pledrotomaria. (Species uncertain.) 



Lower beds, T. C. Weston, 1884 : three badly preserved casts of the 

 interior of shells, either of which may be briefly described as nearly lenti- 

 cular, three times as broad as high, with a very slightly elevated spire, 

 an acutely angulated periphery, and an umbilicus occupying about one- 

 third of the diameter of the base. Similar specimens, from Division 1 of 

 the Anticosti Group, at Junction Cliff, Anticosti, in the Museum of the 

 Survey, are labelled "Pleurotomaria acuta, Sowerby," apparently on the 

 authority of the late Mr. E. Billings. The writer, however, has failed to 

 find any mention of that species in the second edition of Morris's " Cata- 

 logue of British Fossils " (1854), in Dr. Bigsby's " Thesaurus Siluricus " 

 (1868), or in the first volume of Etheridge's " Eossils of the British Islands 

 (1888), but the name P. acuta was given to an English Carboniferous 

 fossil by Professor John Phillips in 1836, in the second volume of the 

 " Geology of Yorkshire." 



Murchisonia bellicincta. Hall. 



Murchimnia bellicincta. Hall 1847. Pal. N. York, vol. I., p. 179, pi. 39, figs. 



1, ffl-C. 



Billings.... 1863. Geol. Canada, p. 183, fig. 177. 

 " Nicholson .. 1875. Rep. Pal. Prov. Ont., p. 18, and p. 19, 



fig. 7 a. 



Lower beds, T. C. Weston, 1884 : several very imperfect specimens. 

 Murchisonia gracilis. Hall. 



Murchisonia gracilis. Hall 1847. Pal. N". York, vol. I., p. 181, pi. 39, figs. 4,a-c. 



" " Salter 1859. Geol. Surv. Can., Can. Org. Rem., Dec. 1, 



p. 22, pi. 5, fig. 1. 

 Billings. . . .1863. Geol. Canada, p. 183, fig. 178. 

 Nicholson. .1875. Rep. Pal. Prov. Ont., p. 18, &p.l9, fig. 7f. 

 6 



