PLATE XIX. 



FlG. 1. Equisetites columnaris, Brongniart. Page 60. [V. 2613a.] 



Fig. 2. Marchantites erectus (Leckenby, ex Bean MS.). P. 51. 



[V. 3652.] 



Fig. 3. Equisetites columnaris, Brongn. P. 60. [40,681 ] 



Fig. 4. Equisetites columnaris, Brongn. P. 61. [10,379.] 



Fig. 5. Equisetites columnaris, Brongn. P. 58. (From a specimen in 

 the Leckenby Collection, Cambridge.) 



Fig. 6. Ripple-marked shale. P. 48. [40,565.] 



