125 



CEPHALOPODA. 



Orthoceeas Selkirkense, Whiteaves. 



Orthoceras Selkirke7ise,Whitea,ves..lS92. Trans. Royal Soc. Canada, vol. IX., 



sect. i. p. 82, pi. 8, figs. 2, 2, a-h. 



Lower beds, T. C. Weston, 1884 : a crushed and badly preserved speci- 

 men which appears to be referable to this species. 



AscocEEAS. (Species undeterminable). 



Lower beds, Dr. R. W. Ells, 1875 : an imperfect and badly preserx'ed 

 cast of the interior of a shell belonging to (his genus. 



LiTOCEEAs iNSiGNE, Whiteaves. 



Apsidoceran inniqne, Whiteaves. . .1890. Trans. Royal Soc. Canada, vol. VII. sect. 



4, p. 82, pi. 17. 



Lower beds : the type of the species, a large specimen, which was 

 kindly presented to the Museum of the Survey in 1889 by the Manitoba 

 Historical and Scientific Society. This specimen is probably not an 

 Apsidoceras, as it was at one time supposed to be, and is here provision- 

 allj' referred to Litoceras on the ground that it is clearly congeneric with 

 the Nautilus Hercules of Billings, which Hyatt has recently referred to 

 that genus, though with a query.* 



CRUSTACEA. 



OSTRACODA. 



Leperditia subcylindeica, Ulrioh. 



Leperditia xubcylindrica, lj]rich. . . .1SS9. Geol. Surv. Canada, Contr. Micro-Pal. 



Cambro-Silur. rocks, &o., pt. 2, p. 49, pi. 9, 

 figs. 4, a-h. 



Lower beds, Dr. R. W. Ells, 1875, or T. C. Weston, 1884 : one 

 *' complete carapace." 



♦Phvlogeny of an Acquired Characteristic, p. 480. 



6i 



