22 
Explanation of Plats V. 1 
Figure 1, ' Brachydonf.es athabaskaensis McLearn n.sp. Left valve, partly exfoliated. Geol. Burv., 
Can., Mus. No. 5403, holotype, 
2. The same. Mould of exterior of left valve, Geol, Surv., Can., Mus. No. 5404, paratype. 
3. Tellina dowlingi McLearn n.sp. Mould of interior of right valve. Geol. Surv., Can., 
Mus. No. 5405, holotype. 
4. The same. Left valve of a large convex specimen. Geol. Surv., Can., Mus. No. 5406b, 
paratype. 
5. The same. Right valve of a large convex specimen. Geol. Surv., Can., Mus. No. 5406a, 
paratype. 
6. The same. Left valve of a partly exfoliated shell. Geol. Surv., Can., Mus. No. 5406, 
paratype. 
J A11 illustrations are natural size. 
