150 Ajjpendix. 



PLATE II. 



Spirifer Jlmbriatus. (S. G. M.) Fig. 1. Shell oval, elliptical, 

 compressed, with decussated strise, and concentric distant ridges ; 

 radiating series numerous, prominent ; decussating strise minute. 



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

 cussated, with a sinus in the larger valve ; 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. 



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

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

 vex ; base emarginate, 



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

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

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

 the middle. 



Fig. 6. An indeterminate cast. 



Fig. 7. Spire of a univalve, indeterminate. 



Fig. 9. Anthophyllum. (Goldfuss.) The fossil figured by Dr. 

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



Fig. 10. Turlinolia. 



Fig. 11. Cyathocrinites pinnatusl (Goldfuss.) If so, the draw- 

 ing is defective, for the stellse should be bounded by a perfect ring. 



Fig. 12. Productus : indeterminate. 



Fig. 13. Cast of a Trochus. 



Fig. 14. Indeterminate univalve: a furruginous cast. 



PLATE III. 



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

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

 tire, and slightly convex : sutures not visible. Diameter about five 

 inches. 



Fusus 1 inhabilis. (S. G. M.) Fig. 14. Shell short, fusiform, 

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

 ened ; aperture elliptical. 



