42 Reports & Proceedings — Geological Society of London. 



whicli have not been foutul, liowever, in the Ashglll Sliales. Dicello- 

 graptus anceps, jSTich., comes in the Phacops Beds, and ranges up into 

 the beds above the Volcanic Grroup. The Ashgillian beds are, 

 therefore, the zone of Bicellograptus anceps. 



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

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

 for the Ashgillian beds of the ^N'orth of England. 



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

 sequence has been previously established, are given. 



2. " TheTrilobite 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 Agraulos of. 

 quadrangular is, Whitfield, Conocoryphe (equalis, Linnarsson, C. hufo, 

 Hicks, C. impressa, Linnarsson, Microdiscus punctatus, Salter, together 

 with new species of Paradoxides, Dorypyge, Ptychoparia {Liostracus), 

 and some indeterminate forms, provisionally referred to Agraulos 

 (Strentiella). 



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 

 probably equivalent to a part of the Paradoxides tessini zone of 

 Scandinavia. As they are specifically distinct from those of the Quarry 

 Ridge 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, collected 

 in 1892 by Mr. J. Rhodes for H.M. Geological Survey. These are 

 referred to P. hiclsi, Salter, and to a new variety of P. hohemicus, Boeck. 



Species of Agnostus, Ptychoparia (Liostracus), Agraulos, Ilyolithus, 

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

 well-preserved for exact specific determination. 



December 18, 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 iLandible in 

 a Flint-bearing Gravel overlying the Wealden (Hastings Beds) at 

 Piltdown, Fletching (Sussex)." Bv Charles Dawson, F.S.A., F.G.S., 

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



The gravel in w^hich the discovery was made occurs in a field near 

 Piltdown Common, in the parish of Fletching (Sussex), and is 



