3880 Reports and Proceedings—Geological Society of London. 
3. “Notes on the Bagshot Beds and their Stratigraphy.” By H. 
G. Lyons, Esq., R.E., F.G.S. 
The author deplored the necessity of quitting the area which he 
had studied before completing his observations, and wished to place 
his results at the disposal of other workers. 
In a previous paper he had discussed the beds at their southern 
outcrop, over a small area, and showed that there the Bagshot and 
London Clay strata remained of constant thickness, and dipped 
northwards at an angle of about 21°. He had since examined the 
country between Aldershot and Ascot over an area of about fifteen 
miles square, and attempted by contouring the surface of the Middle 
Bagshot beds (which showed a nearly constant thickness of 60 feet 
over the area), to give the form into which the beds had been 
pushed by the different slight flexures which might occur. After 
giving details of the heights at which this surface was found, he 
concluded that an anticlinal of which the axis pointed upon Windsor 
Castle, appeared to pass through the Swinley and Wellington 
College area, and probably to Hazeley Heath ; and that a synclinal 
started by Minley and Hawley, and ran by the Royal Albert Asylum, 
Gordon Boys’ Home, upon Ongar and Row Hills, and Woburn Hills ; 
and that another anticline ran to St. George’s Hill, Weybridge. 
The author had attempted to map the southern and eastern limits 
of the Upper Bagshot beds, and claimed a much greater extent 
for these beds in those directions than had been assigned by the 
members of the Geological Survey. The outcrop of the beds was 
described in some detail, and the occurrence of outliers on Knaphill 
Common, by Donkey Town, on Chobham Common, and on Staples 
Hill, was noted. 
4, “Description of some New Species of Carboniferous Gastero- 
poda.” By Miss J. Donald. Communicated by J. G. Goodchild, Esq. 
The Gasteropoda described in this paper have, with one exception, 
been collected by Mr. John Young from the Upper Limestone Series 
of Scotland. After discussing the characters of the genus Orthonema, 
Meek and Worthen, the following forms were described: Orthonema 
pygmea, n. sp.; O.?, n. sp.; Murchisonia turriewlata, de Kon. (Yore- 
dale Shales, Askrigg, Yorkshire) ; M. turriculata, var. scotica; and 
M. compacta, n. sp. 
d. “ Cystechinus crassus, a New Species from the Radiolarian 
Marls of Barbadoes; and the evidence it affords to the Age and 
Origin of those Deposits.” By J. W. Gregory, Esq., F.G.S. 
In this paper the discovery of a species of Cystechinus from the 
Radiolarian earth of Barbadoes was recorded. The specimen is now 
preserved in the National Collection, South Kensington. The form 
was described and distinguished from the three modern species 
which were found during the ‘Challenger’ Expedition. The latter 
have shown that the bathymetrical range of the genus is from 1050 
to 2225 fathoms. 
The author gave proofs that the specimen really came from the 
Radiolarian marl, and not from the overlying Coralline Limestone, 
and after discussing the age of the marl, as inferred by Prof. H. 
