BRITISH ISLES. 17 



Wales ; they occur in the neighbourhood of St. David's. The Cambrians 

 lie unconformably on them ; they are called after the old name of the 

 Welsh kingdom and the name of the Hundred. (Paper read at the 

 St. David's Geol. Society.) 



HobMrk, C. P. The Alleged Submerged Forest near Holmfirth. 

 Naturalist, ser. 2, vol. i. pp. 138-141. 



Quotes from Mr. Plant (see p. 30) a description of this buried peat- 

 bed, correcting his statement as to the underlying shale (which is in 

 Millstone Grit, not Coal Measures), denying the soundness of the heart- 

 wood of the forest-trees, and doubting the occurrence of a lake after the 

 peat-deposit, as rain-wash could form the overh'ing clay. The date is 

 probably pre-Eoman. Mr. J. Tindall adds a note on the number of 

 trees and hazel-nuts, many of the latter being perforated, as if by the 

 nut-hatch. W. H. D. 



Hopkinson, J. Excursion to Hatfield. Proc. Geol. Assoc, vol. iv. 

 no. 8, pp. 518, 519. 



Home, John. The Glaciation of the Shetland Isles. Nature, vol. xv. 



p. 139. 

 Thinks that the strisD of these isles are due to the united Scotch and 

 Scandinavian ice-sheets. 



Notes on the Geology- (pp. 65-67) of " The Parish of Glen- 



cairn, Dumfriess-shire," by the Kev. J. Monteith. 8vo. Glasgow, 



Howard, Thomas. On the Kiver Avon (Bristol) ; its Drainage Area, 



Tidal Phenomena, and Dock Works. Bep. Brit. Assoc, for 1875, 



pp. 175-184, pi. vii. 



The Avon carries more mud than any river in England, except the 



Humber. The tide-water contains, on an average, about i^y^th part of 



mud. Analyses of alluvium and tidal mud, by W. W. Stoddart, are 



given. W. T. 



Howchin, Rev. W. The Geology of Morpeth and its Neighbour- 

 hood. Wilson's ' Handbook to Morjyeth: Pp. 103-110. 8vo. 

 Morpeth. 



The rocks of the district are Carboniferous Limestone, Millstone Grit, 

 and Coal Measures. Each division is described, also localities for fossils 

 and the Drift beds. The pre-glacial course of the Kiver Wansbeck was 

 from Morpeth towards the S.E. ; it now runs E. from that town, having 

 cut a new and deep channel through the Coal Measure sandstones. The 

 old river-terraces, the modem alluvial flats, and the evidence of recent 

 atmospheric waste are pointed out. 



[The author describes the occurrence of a Leda (supposed to be 

 L. lanceolata) in Boulder Clay at Ashington; subsequently to the pub- 

 lication of this paper he proved it to bo an included Carboniferous 

 fossil.] W. T. 



1876. 



