38 GEOLOGY. 



to the W. and N.W. Glaciated rock-surfaces are rare in Berwickshire, 

 that at St. Abb's Head being the only well-marked example. Erokcn 

 surfaces of rocks (the underlying rocks being solid) are referred to 

 ice. * W.T. 



Stoddart, W. W. Geological Distribution of some of the Bristol 

 Mosses. Proc. Bristol Nat. Soc. n. ser. vol. i. pp. 190-199. 



. Geology of the Bristol Coal-field. Part 2. Silurian and De- 

 vonian. Proc, Bristol Nat. Soc. n. ser. vol. i. pt. 2, pp. 262-272. 



Describes the IJ. Llandovery Sandstone and the Wenlock Shales and 

 Limestone, and gives list of fossils. The Old Hed Sandstone is also 

 described, and some of the fish-remains occurring in it are noticed. 

 Many sections are given (10 woodcuts). H. B. W. 



Sutherland, Adam. Sketch of the Coal-fields in the neighbourhood 

 of Irvine. Proc. Olasg. Nat. Hist. 8oc. vol. ii. part 1 . 



Describes the peculiarities of the Bogside parrot-coal, used for the 

 manufacture of Parafiin, and shows that its oily character diminishes 

 towards the east. J". E. T. 



Talbot, H. T. The Chloritic Marl of Cambridgeshire. 3 Hep. Win- 

 chester Coll. Nat. Hist. Soc. pp. 36-40. 

 An account of the bed, the manner of working, and the fossils. 



Tate, [Prof.] R. On the Lias about Eadstock. Quart. Journ. Geol. 

 Soc. vol. xxxi. pp. 493-510. 



The Lower Lias at Eadstock is only 24 feet thick, but the author 

 recognizes the usual Ammonite zones, each very thin on account of the 

 failure of sediment. The zones are described and their fossils enume- 

 rated. The top of the L. Lias had been partially denuded before the 

 deposition of the Middle Lias ; the results of this are seen in the con- 

 glomerate which forms the base of the M. Lias (or Yellow Lias). In this 

 division also (15 feet thick) the author recognizes the usual zones of 

 the Am. Jamesoni series, to which it is wholly referred. The following 

 new species are described : — Trochus solitarius, from the conglomerate 

 bed; Cryptcena affinis^ Cardita consimilis, Cardinia rugulosa, from 

 zone oi Am. Jamesoni. Appended to the paper are: — List of species 

 from the Yellow Lias, Hewlett's HiU, Cheltenham ; Section [of Middle 

 Lias] in Eailway cutting, Fenny Compton, Warwickshire. "W. T. 



Tawney, E. B. Notes on Trias Dykes. Proc. Bristol Nat. Soc. 

 n. ser. vol. i. part 2, pp. 162-166. 



Notices the dyke on the Observatory Hill, which occurs in the 

 Mountain Limestone, and is composed of Dolomitic conglomerate. It 

 is considered to have been filled in Triassic times. Several other fissures, 

 from a few inches to 3 feet wide, filled with Triassic material (in the 

 Avon 0115*8), are noticed, as also some filled with Ehaetic and Liassic 

 material in the neighbourhood of Bristol. The general direction of 

 these fissures and of the joints in the Mountain Limestone are pointed 



