EXPLANATION OF PLATE VII. 



This plate, drawn on stone under my own direction, is intended to present, as 

 faithfully as possible, the characters of some of the more rare and critical shells 

 of the Canadian Post-pliocene. 



Fig. I. Astarte Banksii — A full-grown specimen of the ordinary type. Riviere- 

 du-Loup. 



Fig. 2. Astarte Laurentiana — An average full-grown specimen. Montreal. 

 Fig. 3. Astarte /a^/<?«— Ordinary type. Portland, Maine. 



Fig. 4. Astarte EUiptica — A specimen with the ribs extending nearer to the 

 ventral margin than usual. Portland, Maine. 



Fig. 5. Biicciiiuni temie — Full-grown specimen. Riviere-du-Loup. 5^ — 

 Sculpture enlarged. 



Fig. 6. Buccinum cyaneiim — Full-grown specimen. Riviere-du-Loup. 6<7 — 

 Sculpture enlarged. 



Fig. 7. Buccinum undulatum — (Var. of imdatiim) — Immature shell, broken 

 at lip. Riviere-du-Loup. 'ja — Sculpture enlarged. 



Fig. 8. Buccinuvi glaciate — Tuberculated variety. Riviere-du-Loup. %a — 

 Sculpture enlarged. 



Fig. 9. Buccinum glaciate — Smooth variety. Riviere-du-Loup. 9^ — Sculp- 

 ture enlarged. 



Fig. 10. Buccinum ciliatum — -(Fabricius, not Gould) — Smooth variety, some- 

 what decorticated. Montreal. 10^ — Sculpture enlarged. 



Fig. II. Buccinum ciliatum — (Fabricius, not Gould) — Small but mature speci- 

 men. Recent Murray Bay. 



Fig. 12. Buccinum Grocntatidicum — Adult specimen. St. Nicholas. 12^: — 

 Sculpture enlarged. 



Fig. 13. Choristes elegans — (Carpenter) — Adult specimen. Montreal. 13a — 

 Sculpture enlarged. 



Fig. 14. Capulus commodus — Pt. Levi, Quebec. 



