53 
margins of ears, total, 9; re-entrant angle, 160 degrees; apical angle, 113 
degrees. 
Locality. Zone of Aucella canadiana, west side of a small bay on the 
southwest shore of the peninsula. 
Name. The species is a syntopite with the Aucellae of the canadiana 
zone. 
Family, anomiidae 
Genus, Anomia Linn^ 
Anomia columhiana sp. nov. 
Plate XIV, figures 4, 5, 6 
Differs from A. albertensis McLearn in its larger size and in having 
a much finer ornament of radial stri®. The stri® become slightly stronger 
as they strike the margin of the shell. The outline of the shell is rather 
variable. The shell is marked also by concentric irregularities of surface 
comparable with varices. 
Dimensions. Holotype — equidimensional, though somewhat crushed; 
width, 57 mm. Para type — width, 55; height, 60. 
Locality, Zone of Lilloettia lilloetensis, on Billhook creek at 3,100 
feet altitude. 
Name. After British Columbia. 
Family, mytilidae 
Genus, Mytilus Linnaeus 
Mytilus edulis Linnaeus 
Fragments of this common living species, very typical as regards 
form and dimensions. 
Locality. Main line of Canadian Pacific railway, 838 yards west of 
the west end of the Harrison River bridge. 
Order, Anomalodesmacea 
Family, pleuromyacidae 
Genus, Pleuromya Agassiz 
Pleuromya harrisonensis sp. nov. 
Plate XV, figures 1, 2, 3 
Shell, pleuromyiform, small, robust, not perceptibly gaping, having 
a shallow sulcus in the antero-lateral area running radially from umbo 
to basal margin. Cardinal area obscure. Post-umbonal slope, concave. 
Posterior dorsal margin, expanded postero-dorsaily. No cardinal groove. 
Maximum diameter is vertically below the umbones. Ornament of con- 
centric wrinkles, which become weak on the posterior end of the shell. 
They are obscured by matrix on the anterior end of the only specimen. 
