34 

 HETEEOPODA. 



BUOANIA STIQMOSA (?) Hall. 



Plate 5, figs- 3 and 3a, and pi. 8, fig. 4. 



Bucania stigmosa, Hall. 1852. Palseont. N. York, vol. 2, p. 92, pi. 28, figs. 8, 8 a to e. 



Gait : A. Mun-ay and B. Billings, 1851 : two casts of the interior of 

 the shell. These agree perfectly with similar but better preserved 

 casts from the Niagara Formation at Grimsby, Ont., in the Museum of 

 the Survey, which have been identified with B. stigmosa by E. Bill- 

 ings, but in the absence of any knowledge of the shell of the Gait 

 specimens their determination must be regarded as doubtful. 



Tremanotus Alpheus, Hall. 



Bellerophon an^Mstota, Billings, as of Hall 1863. Gaol. Can., p. 344, 



fig. 352. 



Bucania Ghicagoends, McChesney 1860, New. Pal. Foss. Expl. 



of pi. 8, fig. 4. 



Tremanotws Alpheus, Hall 1864, Eighteenth Eeg. Eep., 



p. 347, pi. 15, figs. 23 

 and 24. 



Bellerophon (Bucania) perforatuSjWinchell &M.a,rcy . 1865 (?) Mem. Bost. Nat. 



Hist. Soc, vol. 1, p. 100, 

 pi. 3, fig. 7. 



Tremanotus Alpheus, Hall and Whitfield 1875, Pal. Ohio, vol. 2, pt. 2, 



p. 145, pi. 8, fig. 1. 



Guelph: Hespeler, T. C.Weston, 1867 and 1811 : Blora; Mi-. D. Boyle, 

 1880: Dm-ham ; Mr. J. Townsend. ISTot uncommon. 



As Professor Hall has pointed out,* the specimen figured in the 

 " Geology of Canada " as Bellerophon angustatus is no doubt referable to 

 T. Alpheus, as are also a dozen other good specimens in the Survey 

 Museum. But in justice to the memory of Mr. E. Billings, who was 

 oflcially responsible for the palseontological part of the volume cited, 

 it should not be forgotten that the " Geology of Canada " was published 

 a year before the first description of T. Alpheus ajjpeared in print. 

 Moreover, it is by no means clear that T. Alpheus is sufficiently distinct 

 from Bucania angustata. On the contrary it is highly probable that 

 these two names have been given to the same species in different states 

 of preservation. Prof. Hall states that T. Alpheus "bears some resem- 

 blance to Bucania angustata," * * " but difi'ers in the more rotund 

 volutions, and in the interrupted oblong nodes representing the per- 

 forations on c^he periphery, while that species is free from nodes or 



* Eighteenth Eeg. Eep., p. 347. 



