﻿BEITISH FOSSIL CEPHALOPODA. 77 



1871. — C. Lapworth and J. Wilson, "On the Silurian Eocks of the Counties 

 of Roxburgh and Selkirk," G-eol. Mag., vol. iii. p. 456, record Orthoceras tenui- 

 cinctum, 0. ibex, and 0. tracheale, from Riccarton. 



1872. — Btheridge, 'Memoirs of the Geological Survey Sheet, 98 N.E. :' 

 " G-eology of the country round Kendal, Sedbergh, Bowness, and Tebay," records 

 Lituites giganteus, Orthoceras ibex, 0. ludense, 0. primcevum and 0. subundulatum, 

 from the Coniston Grits. 



1872. — Etheridge, 'Memoirs of the Geological Survey Sheet, 98 S.E. :' "Geo- 

 logy of the neighbourhood of Kirby Lonsdale and Kendal," records Orthoceras 

 primcevum, from the Coniston Flags ; 0. subundulatum, 0. angulatum, 0. ludense, 

 0. primcevum, 0. virgatum, and Trochoceras sp., from Coniston Grits; 0. angulatum, 

 0. bullatum and 0. tracheale, from Ludlow rocks. 



1872. — Nicholson, "On the Occurrence of the genus Endoceras in Britain," 

 Geol. Mag., vol. ix. p. 102, describes a surface fragment from Coniston Mudstones 

 as Endoceras proteiforme (Hall). 



1873. — Salter, ' A Catalogue of the Collection of Cambrian and Silurian Fossils 

 contained in the Geological Museum of the University of Cambridge,' records 

 Orthoceras sericeum from Tremadoc Slates, Cyrtoceras multicameratum (Hall), Ortho- 

 ceras centrale (?) and 0. fluctuatum, the last a new species, from the Lower Bala ; 

 Orthoceras vagans, 0. politum, 0. bilineatum, 0. annulatum, 0. ibex, 0. arcuoliratum, 

 Ormoceras sp., Lituites cornu-arietis, L. anguiformis, L. planorbiformis, from Middle 

 Bala ; Orthoceras tenuistriatum, Upper Bala ; Phragmoceras ventricosum and Ortho- 

 ceras annulatum, from May Hill Sandstone ; Orthoceras subundulatum, 0. primcevum, 

 0. ventricosum, 0. angulatum, 0. subannulatum, 0. tenuicinctum, 0. laqueatum, 

 0. dimidiatum, 0. tracheale, 0. annulatum, and Trochoceras sp., from Wenlock 

 Shales; — Orthoceras angulatum, 0. dimidiatum, 0. annulatum, and var. fimbriatum, 

 0. Brightii, 0. mocktreense, 0. ludense, 0. canaliculatum, 0. subundulatum, 0. tenui- 

 cinctum, 0. perelegans, 0. ibex, 0. dulce (Barr.), 0. laqueatum, 0. subannulare, 

 0. primcevum, 0. ventricosum, 0. distans ; Phragmoceras ventricosum, P. pyriforme, 

 and P. aequale, the last-named being a new species ; Cyrtoceras Biddulphii, C. com- 

 pressum, C. corniculum (Barr.), Trochoceras giganteum, and T. spurium, the last a 

 new species, all from the Wenlock Limestone ; — Orthoceras jilo sum, 0. dimidiatum, 

 0. ibex, 0. tenuiannulatum, 0. angulatum, 0. subundulatum, 0. perelegans; Phrag- 

 moceras ventricosum, P. intermedium, P. p>yriforme, P. liratum, a new species ; 

 Trochoceras giganteum and Lituites articulatus, from the Lower Ludlow; — Orthoceras 

 ibex, 0. bullatum, 0. angulatum, 0. subundulatum ? 0. Maclareni, 0. tenuicinctum, 

 0. torquatum, 0. tenuiannulatum, 0. tracheale, 0. imbricatum, 0. dimidiatum, 

 0. baculiforme, 0. perelegans, from the Upper Ludlow ; and Orthoceras tracheale, 

 0. bullatum, and Tretoceras semipartitum, from the Passage Beds. 



1873.— Hicks, " On the Tremadoc Rocks in the Neighbourhood of St. David's, 



