510 Reports and Proceedings. 
lying shale and limestone. According to the highest authorities , 
the two shales are lithologically undistinguishable from each other. 
The fossil evidence is, however, much more complete than it was a 
few years ago. Specific differences distinguish the fossils of the 
shale above the Limestone from those of the shale beneath, but the 
fossil evidence seems to show that the Upper shale has more in- 
timate relationship to the Wenlock Limestone below than to the 
overlying Aymestry Limestone. Hence the author concludes that 
this deposit should be placed among the members of the Wenlock 
group. Extensive tables of the distribution of organic remains 
through the Silurian rocks of Dadley accompanied the paper. 
A summary of these lists shows that of corals the Upper Shale 
has twenty-seven species, of which twenty-three are found in the 
Limestone below; but none of them are found in the typical Lower 
Ludlow Rocks of the Ludlow district. Of Trilobites the Upper 
Shale has twenty species and subspecies, fourteen of which are also 
in the Limestone below. The Lower Ludlow of the Ludlow district 
has eight species, four of which are also in the Upper Shale, and 
the Wenlock Limestone; and of the remaining species, three are in 
the Upper Shale, but not in the Limestone. Of Brachiopoda the 
Upper Shale has twenty-nine species, twenty-four of which are 
also found in the Limestone below. Of crustacea, again, the Upper 
Shale and the Limestone below have yielded specimens of Ceratiocaris 
and Pterygotus, which, until lately, had not been found below the 
Ludlow Rocks. Mr. Allport stated that out of thirty-four species of 
Trilobites found in the shales above and below the limestone, only 
three or four are common to both. He agreed with Sir R. Mur chison 
and others, that the Upper Shale is the ‘representative of the Lower 
Ludlow formation. Mr. Hollier said collectors had generally re- 
garded the tunnel shale as belonging to the Wenlock formation. 
Some very interesting fossils from this formation were exhibited, 
including several undetermined forms from Mr, Capewell’s cabinet ; 
also a new star fish, from the same beds, belonging to Mr. Allport, 
and a fine specimen of Lituttes, from Mr. Johnson’s collection. The 
new Silurian genus of @rustacea excited a good deal of attention. 
Until the character of these Dudley fossils was determined the 
Cirripedia were not known lower than the Rhetic beds, but now the 
finding of Turrilepas Wrightit shows the genus existed in the Silu- 
rian seas. ‘This fossil has been known by ‘the name of Chiton. 
A chart of Fossil Crustacea,* prepared by Messrs. Salter and 
Woodward, was exhibited and described; also, specimens of Cri- 
noidea, from the Mountain Limestone of Yorkshire, which have been 
recently presented to the museum by Mr. E. Wood, F.G.S., of Rich- 
mond. 
THE GEOLOGICAL SocieTY oF NorwicH made an excursion to 
Hunstanton on the 22nd August under the guidance of the Rev. 
John Gunn, F.G.S., the president of the Society. About twenty 
members were present. The principal objects of geological interest 
* See Guotocicat Macazinu for October, p. 468. 
