Geohgical Society. 147 



up into the beds above the Volcanic Group. The Ashgillian beds 

 are, therefore, the zone of Dicellograptus aneeps. 



The succession in this district is much clearer than in the Lake 

 District, and it is suggested that it be adopted as the type sequence 

 for the Ashgillian beds of the North of England. 



Some notes on the faunas of the Silurian rocks, of which the 

 detailed sequence has been previously established, are given. 



2. ' The Trilobite Fauna of the Comley Breccia-Bed (Shropshire).' 

 By Edgar Sterling Cobbold, F.G.S. 



The Author describes a trilobitic fauna from the matrix of a 

 breccia of Middle Cambrian age, found near Comley Brook, in one 

 of the excavations made for the Excavations Committee of the 

 British Association. This fauna includes forms referred to AgravJos 

 cf. quadrangvlaris Whitfield, Conocorgplie, cequalis Linnarsson, 

 C. bufo Hicks, C. impressa Linnarsson, M icrodiscus punctatus Salter, 

 together with new species of Paradoxides, Dorypyge, Ptychoparia 

 {Liostracus), and some indeterminate forms, provisionally referred 

 to Agraulos (Strenuella). 



This Breccia-Bed is made up of the recompacted waste of Lower 

 Cambrian sandstones, many of the included blocks yielding species 

 belonging to the Protolenus-Callavia fauna. It rests directly upon 

 bedded Lower Cambrian sandstone, and is therefore regarded as a 

 basal deposit of the Middle Cambrian. 



The fossils contained in the matrix indicate an horizon that is 

 probabty equivalent to a part of the Paradoxides-tessini Zone of 

 Scandinavia. As they are specifically distinct from those of the 

 Quarry-Bidge Grits of Comley, which are also basal but rest upon 

 Lower Cambrian limestones containing the Protolenus-Callavia 

 fauna, the inference is drawn that the two deposits are separated 

 by a distinct interval of Cambrian time. 



3. ' Two Species of Paradoxides from Neve's Castle (Shropshire).' 

 By Edgar Sterling Cobbold, F.G.S. 



The Author figures portions of two species of Paradoxides, col- 

 lected in lb92 by Mr. J. Bhodes for H.M. Geological Survey. 

 These are referred to P. liicksi Salter, and to a new variety of 

 P. bohemicus Boeck. 



Species of Agnostus, Ptychoparia (Liostracus), Agraulos, Hyo- 

 lithus, and Acrotreta occur in the same rock-fragments, but are not 

 sufficiently well-preserved for exact specific determination. 



December 18th, 1912. — Dr. Aubrey Strahan, F.R.S., President, 

 in the Chair. 



The following communication was read : — 



'On the Discovery of a Palaeolithic Human Skull and Mandible 

 in a Flint-bearing Gravel overlying the AVealden (Hustings Beds) 

 at Piltdown, Fletching (Sussex).' By Charles Dawson, F.S.A.. 

 F.G.S., and Arthur Smith Woodward, LL.D., F.R.S., Sec.U.S. 

 With an Appendix by Prof. G. Elliot Smith, M.D., F.lt.S. 



The gravel in which the discovery was made occurs in a field 



