265 



and Illinois that he figures and refers to 0. angulatum and 0. virgatum, 

 is ' precisely like that of 0. cancellatum, Hall, from the Niagara group of 

 New York, and diiFers in no essential particular from the minute surface 

 markings of 0. columnare.' But Dr. Foord has shown that Eichwald's 

 Orthoceratites cancellatus is an Endoceraa, and the specific name cancel- 

 latum, does not appear to be preoccupied in Orthoceras, and certainly is 

 not in Kionoceras. And if it be objected that ' once a synonym always 

 a synonym ', then the next specific name to be selected would seem to be 

 K. or (0.) Scammoni, if Hall's 0. cancellatum is not the same as the 

 0. canaliculatum of Sowerby.'' 



Orthoceras, sp. indet. 



Apparently brevicone ; longitudinally ridged, ridges unequal in size 

 and irregular in distribution. 



Portage road at falls : a fragment that is not sufficiently long to shew 

 conclusively whether it formed part of a brevicone orthoceratite or not. 



OiiTHOCERAS Ekwanense, Whiteaves. 



Plate 33, figs. \ k \ a. 



Orthoceras Ekioanensc, Whiteaves 1904. Geol. Surv. Canada, Ann. Rep., vol. 



XIV, pt. F, p. 56. 



" Shell increasing rather rapidly in thickness, compressed, elliptical in 

 cross section ; surface of the test smooth ; septa very close together ; 

 siphuncle apparently central, though the internal structure is badly 

 preserved in the only specimen collected. 



" Portage road at falls : one specimen, a little over two inches in length, 

 and nearly two inches in its longer diameter at the larger end. Perhaps 

 a Rizoeeras, which is possibly an inadvertent spelling of Rhizoceras." 



Phragmoceras lineolatum, Whiteaves. 



Plate 34, figs. 1, la, 2 & 3. 



Phragmoceras lineolatum, Whibeaves 1904. Geol. Surv. Canada, Ann. Rep., vol. 



XIV, pt. F, p. 57. 



" Shell, or cast of the interior of the shell, apparently essentially similar 

 to that of P. Nestor, as described and figured by Hall, in general shape 

 and in that of its aperture, but with the exterior of the test marked with 

 very numerous, closely and regularly disposed, minute transverse impressed 

 lines, that give to the surface a minutely ribbed appearance, under a 

 lens. 



" Middle rapid, a cast of the interior of a large body chamber (figs. I 

 & 1 a) ; foot of portage road, one good specimen and three fragments ; 



