150 



Appendijc, 



PLATE !!• 



Sptrifer jimhriatus, (S. G. M.) Fig, 1. Shell oval, elliptical, 

 compressed, with decussated striae, and concentric distant ridges ; 

 radiating series numerous, prominent ; decussating striae minute. 



Prodiictus pocillum, (S. G. M.) Fig. 2. Shell suborbicular, de- 

 cussated, with a sinus in the larger valve j superior valve very con- 

 cave- 



Spirifer cameratus, (S. G. M.) Fig. 3. Shell triangular, with 

 radiating costae, and a central ridge on one valve, corresponding to a 

 sinus in the opposite valve. 



The lower figure represents, although very inadequately, a per- 

 fect interior of this extraordinary fossil, now in my possession. Each 



of the two cones is formed of a single spiral tube, replaced by quartz 



crystals. 



Terebratuh hovidens. (S. G. M.) Fig. 4. Shell longitudinally 

 subcordate, with a broad sinus on the larger valve ; lesser valve con- 

 vex ; base emarginate. 



Terelratula nuciformis. (S. G. M.) Fig. 5. Shell suborbicular, 

 ventricose ; lesser valve with a slight ridge in the centre, correspon- 

 V dmg to a superficial sinus on the opposite valve ; base truncated in 

 the middle. 



4 



Fig. 6. An Indeterminate cast. 

 Fig. 7. Spire of a univalve, indeterminate. 

 Fig. 9. Anthophyllum, (Goldfuss.) The fossil ugu..^ ^j 

 Goldfuss, under this name, is from the vicinity of Niagara falls. 

 Fig. 10. Turhinolia. 



Fig. 11. Cyathocrimtes ptnnatusl (Goldfuss.) If so, the draw- 

 mg is defective, for the stellje should be bounded by a perfect ring. 

 Fig. 12. Productus: indeterminate. 

 Fig. 1 3. Cast of a Trochus. 



Fig. 14. Indeterminate univalve : a furruginous'cast. 



PLATE HI. 



Ammonites hdlicosus. (S. G. M.) Fig. 8. Shell armed at its 

 external margins with profoundly elevated, robust nodes : back en- 



— d slightly convex : sutures not visible. Diameter about five 



figured 



inches. 



.J 



Fususl inhabiUs. (S. G. M.). Fig. 14. Shell short, fusiform, 

 ventricose : whirl of the spire convex ; spire conical j labium thick- 

 ened ; aperture elliptical. 



