SECTION AT THE FERN LEDGES. 521 



Plant-bed No. 6 2 feet. 



Fine-grained and light-coloured shale, with great abundance of 

 Cordaites Robbii, and Calamites transitionis ; above that a layer of 

 coarse shale, with Cordaites, and stems of plants badly preserved, 

 then a layer of soft, very friable shale, with few fossils ; and, lastly, 

 a layer of coarse shale of a greenish-gray colour, with — 



Pecopteris discrepans, Daws. Abundant. — Cordaites Robbii, 



Daws. Abundant. — Calamites cannceformis, Brongn. Neu- 



ropteris polymorpha, Daws. — Cardiocarpum cornutum, Daws. — 



Cardiocarpum obliquum, Daws. — Pecopteris, sp. nov. Occurs 



abundantly in some of the overlying beds. 



Sandstones and coarse shales, with abundance of plant-remains, 

 principally Cordaites and Calamites . . . . .5 feet. 



Plant-bed No. 7 2 ,, 



This is one of the richest plant-beds of the section. The shales 

 composing it vary much in character in different exposures. They 

 are for the most part of a gray colour, and compact, like a fine-gi'ained 

 sandstone, though they pass into a light-brownish, very fissile, soft 

 shale, and there are some layers of a very black colour. 



Cordaites Robbii, Daws. Very abundant, and in a beautiful state 

 of preservation. — Calamites transitionis, Goeppt. Not abun- 

 dant as good specimens. — C. cannceformis, Brongn. Rare. — 

 (?) Asterophyllites acicidaris, Daws. In very beautiful specimens, 

 very common in certain thin layers. There are two or three 

 other species, occurring also in the overlying beds, which 

 appear to be new. — Annularia acuminata, Daws. Extremely 

 plentiful. — Pinnidaria dispalans, Daws. Extremely plentiful. — 

 [?) Psilophi/ton elegans, Daws. I have obtained several specimens 

 of a Psilophyton, growing in tufts, and closely resembling this 

 species. — Neuropteris polymorplia. Daws. Occasional. — Pe- 

 copteris [Aletliopteris) discrepans. Daws. Abundant, and 

 obtainable in good specimens. — Cyclopteris obtusa, Lesqx. 

 Occasional. — SjjJienopteris marginata. Daws. — ITymenophyllites 

 subfiircalus, Daws. — Cardiocarpum cornidnm, Daws. Quite 

 abundant. — C. obliquum. Daws. Quite abuiulant. — C. Crampii, 

 Hartt. — Alethopteris Perleyi, Ilartt. — Sphcnopteris pilosa, 

 Daws. Several other plants not yet determined. — Insects. 

 A single insect's wing was obtained from this bed by my father 

 and myself. 



Compact sandstone and coarse shales (barren of fossils) . 3 feet. 



