576 Reports and Proceedings—Geological Society of London. 
usual size, the cannel also increasing in the ‘‘'Top Seam,” but in the 
Lower Seam running out altogether. 
This double thickness of coal continued till the “ Wash-out” was 
reached, when both coal and shaly roof disappeared, the space being 
replaced by sandstone similar to that of the beds overlying the shale. 
The clay floor of the Lower Seam had not been much interfered 
with, and this was followed for sixty yards, when the doubly thick 
seam was again met with, and on being followed gradually assumed 
its normal thickness. 
No fossils have been noted in the ‘‘ Wash-out”’ itself, the vertical 
extension of which is unknown. 
3. “On some Paleozoic Ostracods from North America, Wales, 
and Ireland.” By Prof. T. Rupert Jones, F.R.S., F.G.S. 
The chief materials referred to were :—- 
1. Some good specimens of North-American Ostracoda from the 
Lower Helderberg and Cincinnati Groups in the British Museum, 
and the author’s collection ; these have given occasion for a critical 
revision and careful illustration of several forms. 
2. In the ‘Paleontology of New York,’ vol. iii. 1859, several of 
the Paleozoic Ostracoda of New York State were described but not 
figured. Copies of some of the original drawings have been 
courteously supplied, with Dr. James Hall’s permission, by Mr. J. 
M. Clarke, of Albany. They enlarge our knowledge of the Lower 
Helderberg fauna. 
3. A large collection of Paleozoic Ostracoda, collected in the Lake 
Champlain district and elsewhere, sent by Prof. R. P. Whitfield, of 
New York, for examination by the author. 
4. Other specimens belonging to the Utica Slate Series from 
Ontario, presented to the author by Dr John Young. 
5. An interesting series of Lower Silurian (Ordovician species 
from near Welshpool, comprising a characteristic Cincinnati species, 
sent by Mr. J. Bickerton Morgan. 
6. A rare Palzeozoic Cytheroid Ostracod from Kildare, collected 
by Mr. Joseph Wright, F.G.S. 
The specimens were described as nearly as possible in the order 
of their natural relationships and thus, besides adding to the known 
forms, they were shown to illustrate the modifications exhibited by 
the genera and species of these minute bivalved Crustaceans, both in 
limited districts and in different regions. 
Amongst the forms described were the following new species and 
variety :—Primitia mundula, Jones, var. cambrica, nov.; P. humilior, 
sp. nov.; P. Morgani, sp. nov.; P. Ulrichi, sp. nov.; P. Whitfieldi, 
sp. nov.; Entomis rhomboidea, sp. nov.; Strepula sigmoidalis, sp. 
nov. ; Beyrichia Halli, sp. nov.; Isochilina lineata, sp. nov.; I. ? 
jabacea, sp. nov.; Leperditia Claypolei, sp. nov.; Xestoleberis 
Wrightii, sp. nov. 
Tue Rey. EH. Tenison Woops.—We regret to record the death of 
this well-known Australian Geologist, which occurred at Sydney, 
New South Wales, on the 9th October, 1889. 
