﻿74 BRITISH FOSSIL CEPHALOPODA. 



1859. — Salter, 'Geological Survey of Great Britain,' Explanation of Hori- 

 zontal Section, Sheet 45, records Phragmoceras ventricosum, P. pyriforme, Lituites 

 giganteus, Orthoceras subundulatum, O.fdosum, 0. ludense, from the Lower Ludlow, 

 and Orthoceras angulatum, 0. ibex, and 0. bullatum, from the Upper Ludlow, Coal- 

 brookdale. 



1860. — Jukes and Du Noyer, " On the Geological Structure of Caherconree 

 Mountain," Journ. Geol. Soc. of Dublin, vol. viii. p. 106, record Orthoceras 

 subundulatum, from Upper Silurian. 



1860. — Baily, "Notice of Lower Silurian Fossils in County Tipperary," Journ. 

 Geol. Soc. of Dublin, vol. viii. p. 110, records Orthoceras lineatum, 0. elongato- 

 cinctum, 0. tenuicinctum, 0. ibex, and 0. pseudoregulare, from the Lower Silurian 

 rocks of that county. 



1860. — Kelly, "On the Grauwacke Rocks of Ireland as compared with those 

 of England," Journ. Geol. Soc. of Dublin, vol. viii. p. 251. A large number of 

 localities is given for Irish Silurian Cephalopoda, but not, as it appears, from original 

 observation. 



1860. — Baily, in the ' Explanation to accompany Sheet 135,' and in the 

 ' Explanation to accompany Sheet 145,' of the Geological Survey of Ireland, records 

 the same species as above from co. Tipperary, and in the latter memoir gives a 

 figure of Orthoceras elongatocinctum. 



1861. — Salter, in a paper by W. S. Symonds and A. Lambert, " On the Sections 

 of the Malvern and Ledbury Tunnel, and the intervening Line of Railroad," Quart. 

 Journ. Geol. Soc, vol. xvii. p. 152, mentions the occurrence of a new genus from 

 the Lower Ludlow Shales. He describes it as unsymmetrical, like Helicoceras, but 

 belonging to the Nautiloidea. He does not give it any name, nor state whether it is 

 the Trochoceras of Barrande. 



1861. — -'Memoirs of the Geological Survey of Great Britain,' Sheet 32, 

 Scotland : " The Geology of the Neighbourhood of Edinburgh," by H. Howell and 

 A. Geikie ; appendix and list of fossils, by A. W. Salter. The last-named writer 

 describes a new species of Orthoceras, O. Maclareni, and records the presence of 

 O. subundulatum in the Upper Silurian of the Pentlands. 



1861. — Baily, 'Explanations to accompany Sheets 102 and 112 of the Maps of 

 the Geological Survey of Ireland,' records Orthoceras tenuicinctum, and a new species 

 to which the name of O. remotum is given, without characters being assigned, from 

 the Lower Silurian of Portraine. 



1862. — Baily, 'Explanations to accompany Sheet 126,' &c, records Orthoceras 

 fdosum and O. angulatum, from the Lower Silurian Fairymount. 



1862. — Baily, ' Explanatory Memoir to Sheet 133/ &c, records Orthoceras 

 angulatum, O. Brongniarti, O. elongatocinctum, O. lineatum, 0. subundulatum, and 

 0. tenuicinctum, from the Lower Silurian. 



