264 



KlONOCERAS CANCELLATUM, Hall. (Sp.) 



Orthoceras cancellatum, SsM 1852. Pal. N. 'York, vol. II, p. 292, pi. 



63, figs. 1, & 4o, 6; and pi. 65, figs. 4 a, h. 

 Orthoceras columnare. Hall 1860. Rep. Progr. Geol. Surv. Wisoons., p. 



4 ; & (1867) Twentieth Rep. N. Y. St. Mus. 



Nat. Hist., p. 351 ; but not 0. columnare, 



Marklin, 1857. 

 Orthoceras Scammoni, 0. Hoyii^ 0. lineolatum, 

 & 0. irregulare, MoChesney 1861. T)escr. New Foss. Pal. Rocks of the 



Western States, pp. 92-94 ; teste Hall. 



Orthoceras Woodworthii, McChesney 1865. Idem., pi. 7, fig. 7 ; teste Hall. 



Orthoceras Gadmus, Billings 1866. Cat. Silur. Foss. Anticosti, &c., p. 83. 



Orthoceras angulatum, Hall 1867. Twentieth Rep. N.Y. St. Mus. Nat. 



Hist., p. 353, pi. 19 (10), figs. 10 & 11 ; but 



not O. angulatum, Wahlenberg, 1821. 

 Orthoceras virgatv/m, Hall 1867. Op. cit., p. 353 ; but not 0. virgatum, 



Sowerby, 1839. 

 Orthoceras subcancellatum. Hall 1877. Miller's Amer. Pal. Foss., First Ed., 



p. 245. 



Orthoceras orus, Hall 1877. Idem., p. 245. 



Kionoceras cancellatum, Whiteaves 1904. Geol. Surv. Canada, Ann. Rep., vol. 



XIV, pt. F, p. 55. 



" Portage road at falls, two fragmentary specimens, the largest less than 

 two inches in length ; and middle rapid, two similar fragments ; all of 

 which seem to be referable to this species. Each of these specimens is a 

 portion of a longicone orthoceratite, with a circular transverse section, a 

 central or nearly central siphuncle, and marked with narrow longitudinal 

 ridges, separated by wider grooves or intervals, with minute, close-set, 

 transverse, raised lines between them. Specimens with similar external 

 characters have been found in the Niagara and Guelph formations at 

 three localities in Ontario and Quebec. These are the Orthoceras Cadmus, 

 of Billings, from Grimsby and Elora ; a specimen from Elora that the 

 writer has referred to 0. Scammoni; and a specimen from L'Anse a la 

 Barbe, near Port Daniel, in the Bale des Chaleurs, in the Museum of the 

 Survey, labelled 0. virgatum by E. Billings. 



" 0. Cadmus, 0. subcancellatum, and 0. orus are names that have been 

 given to this shell on the assumption that Hall's Orthoceras cancellatum is 

 not the same as the Orthoceratites cancellatus of Eichwald.' Billings, in a 

 paper entitled ' New Species of Fossils from the Clinton and Niagara 

 formations ' and published with his ' Catalogues of the Silurian Fossils of 

 the Island of Anticosti ', says that his 0. Cadmus appears to be 0. cancel- 

 latum, Hall, not Eichwald. And in the explanation of fig. 11, of Plate 

 19 (10) of the Twentieth Regent's Report, Hall says that the character 

 of the surface of impressions of the exterior of specimens from Wisconsin 



