32 
A. complanum is very closely related to A. bigsbyi, but differs from it 
in outline, in the proportionately shorter dorso-ventral diameter, and in 
the more compressed outline of the siphuncle. The figure of the type 1 of 
the latter shows that the siphuncle of A. bigsbyi is not in contact with the 
central wall. 
A. complanum differs from the Manitoba form of A. richardsoni 
in the presence of the septal necks extending half the depth of the camera. 
Horizon and Locality. Richmond: Beaverfoot. Three-fourths mile 
east of trail, Palliser pass, B.C. 
Vaginoceras (?) eccentricum n. sp. 
Plate VIII, figure 2 
Shell incomplete, the body chamber and the apex missing. The 
specimen is 7§ inches in length and has a diameter of 1^ inches at the 
larger end, and ^ inch at the smaller end, in the part preserved. Surface 
altered and worn, but in one part still exhibiting fine growth lines. No 
longitudinal striae preserved. Chambers deep, septa distant from one 
another about half the width of the shell. Siphuncle tubular, about a 
quarter the width of the shell, very eccentric, along one edge not more 
than 1 mm. distant from the external wall. The septal neck extends 
downward the length of the camera, becoming ensheathed by the preceding 
neck and continuing down some distance. The poor preservation of the 
specimen makes it impossible to see exactly where it terminates, though 
in two camera a double wall can be traced to below the middle. The 
siphuncle does not pass through the septa at the centre, the lowest point 
of the concave outline, but near the circumference, so that the septal 
neck ensheathes the siphuncle obliquely, the highest point being on the 
side nearest the outside of the conch. The inside of the siphuncle is not 
sufficiently preserved to show its nature. 
The species is referred to Vaginoceras doubtfully, because in the speci- 
men at hand it cannot be definitely seen whether the second wall is the 
continuation of the septal funnel as in Vaginoceras, or an inner wall. 
Horizon and Locality . Richmond: Beaverfoot. A half mile east of 
the trail, Palliser pass, Rocky mountains, B.C. 
Protokionoceras? gracile n. sp. 
Plate VIII, figures 5, 6 
Shell straight, slender, and fragile, in the septate portion tapering 
very slightly. A fragment without any of the body chamber, measuring 
22 mm. in length, has a diameter of 10 mm. at the widest part and 7 mm. 
at the narrower end. Body chamber expanding more rapidly, a small 
specimen from the head of Windermere creek preserves the lower part 
1 Univ. Michigan, Con. Mus. Geol., vol. 2, pp. 1-12, fig. 7 B. 
