506 
THE GEOLOGIST. 
WenlocJc Limestone. Wenlock Limestone. 
13. Oniphyma Murcliisonii. 27. Euompholus funatus. 
14. Aveolites Grayii. 28. „ carmatus. 
15. Cystiphyllum sp. 
16. Calymena Bliiraenbachii. Wenlock Shale. 
17. Atliyris tuiiiida. 
18. Rhynchonella splierica. 29. Encrinital stems. 
19. „ nucula. 30. Calymena tubeiculosa. 
20. „ borealis. 31. Liugula. 
21. Atrypa marginalis. 32. Orthis hybrida. 
22. „ reticularis. 33. „ biloba. 
23. Strophomeua depresssa. . 34. „ elegautula. 
24. Euompholus rugosus. 35. Rhynchonella sp. 
25. „ discors. 36. Leptena transversalis. 
26. „ scidptus. 37. Acroculia? 
Crustacea are rare at Coalbrookdale, when compared with the same formation 
at Dudley. 
Abstract of paper " On the Inferior Oolite." By the Rev. S. H, Cooke, M.A. 
The Inferior Oolite, as developed on the Cotteswolds, near Cheltenliam, con- 
sists of four chief divisions. 
1. Ammonite Sands, about forty feet thick, transitional between Upper Lias 
and Inferior Oolite is the character of its organic remains, some being peculiar 
to it, as Rhynchonella cpiocephalus, well seen at Frocester and Haresfield HiUs. 
2. Pea-grit, or Pisolite, forty feet thick, confined to the immediate neigh- 
bourhood of Cheltenham ; pisolitic in structure, with many fossils, some pecu- 
liar to it. 
3. Preestone and Oolitic Pearl series, about a hundred and ninety feet thick 
Leckhampton Hill ; the freestone much quarried for building, but generally 
unfossiliferous ; the Oolite-rnarl-bed, about seven feet thick, produces many 
fossils, which are very constant ; near Stroud it contains a thin coral reef, 
with Nerinace. 
4. Ragstone, about thirty-eight feet thick ; a hard gritty rock, with many 
fossils {Gryphcea Buchnannii, i^xxvAm the Swiss Jura and Swalica; and 
Rhynchonella spinosa are peculiar to this division). It keeps a nearly constant 
thickness over the whole district, while all the inferior divisions, along with 
tlie Upper Lias, thin out, and finally disappear towards the east and south-east. 
Thus at Stonesfield the ragstone is thirty feet ; resting on Upper Lias six 
feet, and that on Marlstone twenty-five feet. 
Inferior Oolite is also developed near Dundry, where the chief fossiliferous 
bed probably corresponds in place with the Cheltenham Pisolite ; also in Dor- 
setshire, near Bridport, where it forms the coast section, but is much disturbed 
by faults. Its fauna in these more southern localities differs much from the 
Cotteswoldian, the Bristol coal-field having formed a complete barrier between 
them. It is also largely developed on the Yorkshire coast, about Scarborough, 
where it reaches the thickness of seven hundred feet, and produces thin beds 
of coal, with many ferns and plants. Here, too, its upper beds extend quite 
up to the Cornbrash, the Great Oolite and Porest Marble being absent. 
Berwickshiee and Tyneside Naturalists' Field Clubs. 
On the 24th of August there was a joint meeting of the Berwickshira and 
Tyneside Naturalists' Club at Alnwick. The geological party went to Rat- 
cheugh, under the able guidance of Mr. George Tate of Alnwick. The great 
