154 Appendix. 



^Ammonites Hildrethi. (S. G. M.) Fig. 48. See PI. i, Fig. 24. 

 A silicious cast. 



'} Ammonites coluhrelJus. (S. G. M.) Fig. 49. Shell discoid, much 

 compressed, with numerous slightly convex volutions : sutures sig- 

 moidal. 



X Fig. 50. Pyritous cast of Ammonites Hildrethi. 

 X Fig. 51. Pyritous cast oi Ammonites colubrellus. 

 >f Fig. 52. Indeterminate cast of a univalve. 



X Fig. 53. Pyritous casts oi Ammonites Hildrethi, compressed and 

 distorted. 



> Fig, 54. Sections of same fossil. 

 ■<^ Fig. 55 and 56. Pyritous cast of Turritella 1 

 X Fig. 58. Indeterminate, cast of a bivalve. 

 ^Fig. 59, Pyritous cast of a Terebratula. 

 y Fig. 60. Pyritous cast of another species of Terebratula. 

 i Fig. 61. Cast of a Nautilus. 



>( Fig. 63. Depleura Dekayi. (Green, Monog. Trilob. p. 79.) 

 X Fig. 64. Calymene callicephala. (Green, Monog. Trilob. p. 30.) 

 \ Fig. 65. Calymene bufo. (Green, Monog. Trilob. p. 41.) 



PLATE XXIX. 



^Fig. 65. Uncertain. 



PLATE XXX. 



^Fig. 1. Lepidodendron. 

 AFig. 2. Uncertain. 

 i^Fig. 3 and 4. Pecopteris. 

 i^ Fig. 10. Uncertain. 



PLATE XXXI. 



ji. View of Pomeroy's Coal Bed, at Carr's Run, Ohio. 



PLATE XXXII. 



^ View of Marshall's Pillar— Cliffs of New River, Va. 



PLATE XXXIII. 



View of the Falls of the Kenawha, Va. 



PLATE XXXIV. 



View of the Kenawha Salines. 



PLATE XXXV. 



View of Putnam's Hill from West Zanesville. 



PLATE XXXVI. 



View of Putnam's Hill and the upper Bridge at Zanesville, on the 

 Muskingum River. 



