﻿78 BRITISH FOSSIL CEPHALOPODA. 



South Wales, and their Fossil Contents," Quart. Journ. G-eol. Soc, vol. xxix. p. 51, 

 figures an Orthoceras from Tremadoc Slates, too imperfect to name, but apparently 

 different from 0. sericeum. 



1874. — Barrande, ' Systeme Silurien du Centre de la Boheme,' vol. ii. part 3, 

 describes and figures Orthoceras Thompsoni, from the Silurian (part unknown) of 

 Scotland. 



1874.— J. F. Brown, " The South Wales Coalfield," North of England Institute, 

 vol. xxiii. p. 197, records Orthoceras sp., and Lituites articulatus, from the Silurian 

 in the neighbourhood of Cardiff. 



1875. — Hicks, "On the Succession of the Ancient Rocks in the vicinity of 

 St. David's, Pembrokeshire, with special reference to those of the Arenig and 

 Llandeilo groups, and their Fossil Contents," Quart. Journ. Geol. Soc, vol. xxxi. 

 p. 180 (?), describes and figures Orthoceras caereesiense as a new species from the 

 Upper Arenig rocks. 



1876. — Hicks, in a paper by J. E, Marr, "On Fossiliferous Cambrian Shales 

 near Carnarvon," Quart. Journ. Geol. Soc, vol. xxxii. p. 134, records 0. caereesiense 

 from this locality, 



1877. — Harkness and Nicholson, "On the Strata and their Fossil Contents 

 between the Borrowdale Series of the North of England and the Coniston Flags," 

 Quart. Journ. Geol. Soc, vol. xxxiii. p. 461, record Orthoceras vagans from 

 Keisley ; Endoceras proteiforme and Orthoceras angulation, from the Mudstones. 



1878. — Marr, " On some well-defined Life-zones in the lower part of the 

 Silurian (Sedgwick) of the Lake District," Quart. Journ. Geol. Soc, vol. xxxvi. p. 871, 

 records Orthoceras vagans and a sp. like 0. Troostii, Cyrtoceras sonax, and Lituites 

 cornu-arietis, from the Coniston Limestone, also Orthoceras sp. allied to 0. dulce, 

 0. laqueatum, 0. tenuicinctum, 0. bilineatum, 0. subundulatum, and 0. subannulatum, 

 from the Middle Caldwell Beds ; 0. tenuicinctum, from the Upper Caldwell Beds. 



1879. — Sollas, " On the Silurian District of Rhymney and Pen-y-lan, Cardiff," 

 Quart. Journ. Geol. Soc, vol. xxxv. p. 475, records 0. angulatum, from the 

 Llandovery, Wenlock, and Ludlow Beds of Cardiff. 



