170 CONTEIBUTIONS TO CANADIAN PAL/T;0NT0L0GT. 



PLEiiROMrA Carlottensis, Whitetiven. 



Pleuromija CmioUcnsh, Wliiteaves. ]S7(i. Ge.ol. and Nat. His. Can., Mesoz. Foss. 



vnl. I, p. 57, 1)1. 9, (ig. 8 

 Ph'uromi/a Kuhcomprcwa, rar. C'aWoJdTis/s, Wliiteaves. Is84, Ilj., p. 223, pi. 29, 



figs. 7 and 7a. 



One imperfect but fairl}' oluiracteriHtic Hpecimcn. It is quite possible 

 that the shells for which tliis name was proposed, are only a local 

 variety of the Pleuromija papyracca of Gabb,* from the Shasta Group 

 of California, and tbat the PholaJomya Vancoiwerensis]- which was 

 described and figured by the present writer from a single specimen 

 collected by Dj'. G. M. Dawson in 1S11 from the north-east slope of 

 .Jackass Mountain, in the vallej' of the Lower Eraser Eiver, is, as 

 already stated on page 153, either another variety of the same 

 species, or the same shell in an unusual and very peculiar state of 

 preservation. 



CEPHALOPODA. 



ScHLOENBAflHlA BOREALIS, WhiteaveS. 



(This specie 13 has already been described on page IGO of tliis Report and is 

 figured on Plate 21.) 



Two specimens, which do not scom to differ in any essential particular 

 from the type of S. borealls from the Lewes River. One is a badly 

 preseived cast of the interior of a shell, and the other a well preserved 

 mould of tiie c.Ktorior of another, J both of which measure about three 

 inches and a half in their greatest diameter. 



A third H])ecimeD, wliich is probably only a variety of the same 

 species, was also collected by Mr. McConnoll at this locality. It 

 resembles the type of S. boretUis, both in external form and in the 

 prominence of its simple abdominal keel, but has much coarser ribs, 

 many of wliicb bifurcate halfway across the sides. 



The occuri'cnce of the same species of Ammonite at localities so wide 

 apart as the Kink Eapids of the Lewes River and the Rocky Moun- 

 tains near Devils Lake, is not without significance from a purely 

 geological poi,.nt of view. 



• (Jool. Snrv. Ciilif., Palicoiit. vol. TI, (180(1) |,. 178, i.l. 2:1. fig. K. 



tTrans. Rdyiil Soc. Cm.,, 1882, vol. l.i^oc. IV, ii. 8:i, woodcut, lig. 2. 



X A very similar specimen to this was coiled e<l liv Mr. McCuuncU in the .saineyear a,t a locality 

 aliout fivemilcs rrorn that indicated in the last hcntUng, viz., in the Hocky Mountains, three mih-.s 

 north of Devil's Lake and three miles iKjrth ol' I he Cascade Troufjh. 



