, PLATE XX. 



^~ Fig. 48. Sphenopteris ? 



PLATE XXI. 



^ Fig. 49. Bothrodendron. (Lindley, Tab. 80.) 



Appendix, 153 



y" Fig. 48. Sphenopteris 



*^ Fig. 49. Bothroden 

 XFig. 52. Uncertain. 



PLATE XXII. 



' Fig. 53. See Lepidodendron selaginoides. (Lindley, Tab. 12.) 

 ^Fig. 54. Compare with Stigmaria ficoides. (Lindley, Tab. 31.) 

 ^Fig. 55. Calamites. 

 * Fig. 56 and 58. Uncertain. 



. PLATE XXIII. 



y Fig. 35. Calamites. 



PLATE XXIV. 



•^Fig. 59. Pecopteris dentata ? (Lindley.) 

 /Fig. 60. Uncertain. 



PLATE XXV. 



^ Fig. 63. Lepidodendron. 



. PLATE XXVI. 



#v Terebratula lapillus. (S. G. M.) Fig. 36. Shell suborbicular ; 

 superior valve gibbous in the middle ; inferior valve with a broad si- 

 nus in the middle ; center of the base gibbous. 



Pholadomya elongata. (S. G. M.) Fig. 37. Shell much elon- 

 gated, ventricose, with rather regular, broad, longitudinal sulci ; an- 

 terior side very short, obhquely truncated ; beaks tumid. 

 '^- Productus. punctatus 1 (Sowerby) Fig. 38. Shell suborbicular, 

 decussated; inferior valve ventricose, with a broad central sinus. 

 f Productus hepar. (S. G. M.) Fig. 39. Shell suborbicular ; in- 

 ferior valve with numerous transverse sulci, and a broad, but not 

 profound sinus : umbo profoundly gibbous, divided by a deep sinus. 



K Fig. 40, 41. Vertebrae of Encrini. 

 >' Fig. 42. Indeterminate. 



y Fig. 43. Indeterminate cast in slate, probably of a vegetable pro- 

 duction. 



PLATE XXVII. 



Fig. 64. Uncertain. 



PLATE XXVIII. 



Fig. 44 and 45. Indeterminate casts. 



Fig. 46. Productus. This species, of which the name cannot at 

 present be recollected, has been described and figured in Europe, 

 where it is a common fossil. 

 "Fig. 47. Indeterminate cast. 



Vol. XXIX.--N0. 1. 20 



