1904.] NATURAL SCIENCES OF PHILADELPHIA. 425 



Reference to Plate XXXVI. 



Figures 2 to 5 are natural size; the others are variously enlarged. 



Plate XXXVI Fig. 1. — Pcecilozonites dalli. 



Fig. 2. — Paecilozonites cupula. Locality 806. 



Fig. 3. — Poecilozonites bermudensis zonatus. Locality 808. 



Fig. 4. — Poecilozonites nelsoni form discoides. Locality 806. 



Fig. 5. — Pcecilozonites nelsoni callosus. Locality 818- 



Fig. 6. — Vertigo numellata. Locality 806. 



Fig. 7. — Vertigo marki. Locality 806. 



Fig. 8. — Euconulus turbinatus. Section from compact rock, locality 814. 



Fig. 9. — Euconulus turbinatus. Locality 806. 



Fig. 10. — Euconulus turbinatus. Locality 808. 



Figs. 11, 12. — Carychium bermudense. Locality 806. 



Fig. 13. — Zonitoides bristoli. Locality 818. 



