18 GEOLOGY. 



doubts whether any other spot hitherto examined in Britain could show 

 80 continuous a section of these rocks ; still he believes that there is 

 ample evidence to prove, from researches made in other parts, that the 

 succession here made out was, in most of its important details, capable 

 of being applied to many other districts. The most characteristic fos- 

 sils of the various divisions are named. W. T. 



Hicks, H. On the Cambrian and Silurian rocks of Ramsey Island, 

 St. David's. Proc. Geol. Assoc, vol. iii. no. 4, pp. 155-157. 



The lowest beds are the Lingula Flags, consisting of sandstones and 

 slate, about 600 feet thick, and showing signs of having been deposited 

 in shallow water. On this formation rests conformably the " Tremadoc 

 group," passing up from the flags into a thick-bedded rock, and con- 

 taining abundant fossils throughout (1000 feet). Conformably on the 

 Tremadoc rocks the " Lower Arenig " succeeds, with a rich fauna of 

 Graptolites. The section (of the northern end of the island) shows that 

 there is no considerable break between the Cambrian and the Silurian. 



W.W. 



HoBKiRK, C. P. On the Mosses of the West Riding of Yorkshire. 

 Rep. Brit. Assoc, for 1873, Sections, pp. 104, 105 ; and Journ. Bot. 

 n. s. vol. ii. p. 327. 

 The paper is prefaced by a short introduction descriptive of the prin- 

 cipal geological features of the district. The various river-basins are 

 described ; those of the Wharfe, Upper Aire, and Calder have been most 

 searched. The distribution of nearly 300 species, so far as known, is 

 given. W. T. 



HoPKiNSON [John]. Excursion to Eastbourne and St. Leonards. 

 Proc. Geol. Assoc, vol. iii. no. 5, pp. 211-214. 



Notices the cliff-section from Eastbourne to Beachy Head, the Old 

 Roar quarry (in Wadhurst Clay) with its bone-bed and leaf-bed, the 

 submerged forest near Bulverhithe, &c. W. W. 



HoRNE, J. A Sketch of the Geology of the Isle of Man. Trans. Edin. 

 Geol. Soc. vol. ii. part iii. pp. 323-347, with Plate and woodcuts. 



Discusses the subject under the following heads: — 1. Previous 

 Literature ; 2. Silurian Rocks ; 3. Calciferous Sandstone Series ; 4. 

 Carboniferous Limestone Series, comprising the Lower or Castletown 

 Limestone Group, the Upper or Poolvash Limestone Group, and the 

 Poolvash Black-Marble Beds ; 5. Igneous Rocks ; 6. Glacial Pheno- 

 mena. Under this l&st the author treats of the Glaciation of the low 

 grounds of the island, the Till and Boulder-clay with interglacial beds, 

 the Kame series, the shelly clays and stratified sands and gravels, and 

 the moraines. H. A. N. 



Howell, James. On the Geology of Brighton. Part I. Proc. Geol. 

 Assoc, vol. iii. no. 4, pp. 168-188. 



The author notices the features of the South Downs and of the coast, 

 and the distribution of the beds ; then treats of the recent changes of 

 the coast, the loss of land that has occurred and its prevention by 



