Geological Society. 



535 



18 — 



2 — 



6 — 



2 — 



6 — 



2 or 3 — 



7. Clay, with layers of grit 3 inches. 



8. Clay 2 to 3 — 



9. Light brown sandstone, full of small") 



cypris and cyclas, and consisting I 

 in the lower part of comminuted f 

 shells J 



10. Blue and lower clay, abounding with T 



fragments of shells J 



11. Thin-bedded grit 



12. Fibrous carbonate of lime 



13. Grit 



14. Fibrous carbonate of lime 



15. Soft shelly sandstone. 



16. Light brown and blue limestone," 



abounding with the Isopodous 

 Crustacean; in the lower part, la- 

 minated and numerous cyclades, 

 and a few small oysters , 



17. Blue compact grit, full of impres- 



sions of cyclas 



18. White laminated crystalHne lime- 



stone, very different from that 

 forming Nos. 2 and 4. 

 "Water — inferior strata not visible. 



The Isopods in the bed No. 1 6 often occur in clusters. Lenses 

 of the eye are sometimes detectable in the limestone, and more 

 rarely attached to the head ; traces of legs have also been observed, 

 but no antennae. In the same bed the elytron of a coleopterous 

 insect was discovered. 



Among the heaps of debris, consisting of grits and limestones, 

 derived apparently from beds subjacent to No. 18, but not visible, 

 Mr. Brodie found fragments of a limestone different from the varie- 

 ties in the preceding section, being generally coarser, softer, and 

 less compact, and often white on the edges, but blue in the centre. 

 It passes into a grit, in which he procured oysters, numerous bones 

 and palates of fishes, and a tooth of a saurian. The limestone is full 

 of a large distinct species of cypris ; it contains also traces of car- 

 bonized wood, impressions of small plants, some of which resemble 

 grasses ; likewise remains of Isopods, a few bivalves, apparently 

 cyclades, one fragment of a univalve, and, dispersed throughout its 

 substance, insects and small fishes, sometimes microscopic. The 

 insects discovered by the author consist chiefly of coleoptera, but he 

 procured a beetle with the antennae attached, about half an inch in 

 length ; remains of a Homopterous insect, and probably of several 

 species of Dipterus, presenting distinctly, in some specimens, the 

 wings, legs, and striae of the abdomen ; also a wing of a Libellula. 

 Mr. Brodie believes that this is the first instance of the discovery 

 of insects in a Wealden formation ; and he obsei"ves, that for abun- 

 dance and variety of specimens, the beds of the quarry resembl© 

 more a tertiary (Aix and CEningen) than a secondary deposit. 



