﻿72 BEITISH FOSSIL CEPHALOPODA. 



Chain of Scotland," Brit. Ass. Eep. for 1850, p. 103. In this M'Coy records Orthoceras 

 anellatum (misprint for anellum) (Hall) and 0. politum, from Girvan. The former is 

 not referred to again by M'Coy in later writings, and is probably given up as British. 



]852. — Sedgwick, "On the Lower Palgeozoic Rocks at the base of the Car- 

 boniferous Chain between Ravenstonedale and Ribblesdale," Quart. Journ. Geol. Soc, 

 vol. viii. p. 35. Orthoceras subundulatum and 0. primcevum are recorded from Heaton. 



1852. — Strickland, " On a protruded Mass of Upper Ludlow Rock at Hagley 

 Park, in Herefordshire," Quart. Journ. Geol. Soc, vol. viii. p. 381, records Ortho- 

 ceras bullatum, 0. ibex, 0. perelegans, arid 0. gregarium, from the above rock. 



1852. — M'Coy, ' A systematic Description of the British Palgeozoic Fossils in 

 the Geological Museum of the University of Cambridge,' second fasciculus. In this 

 work the fossils, old or new, are described, and the new ones figured. A number of 

 Bellerophons are described as Cephalopods, being placed in a parallel family with 

 Nautili and Ammonites. The true Cephalopoda described are — Cyrtoceras multi- 

 cameratum (Hall), Orthoceras angulation (Wahl.), 0. Brightii (Sow.), 0. bullatum 

 (Sow.), 0. centrale (His.), 0. dimidiatum (Sow.), 0. filosum (Sow.), 0. imbricatum 

 (Wahl.), 0. laqueatum (Hall), 0. ludense (Sow.), 0. mocktreense (Sow.), 0. politum 

 (M'Coy), 0. primcevum (Forbes), 0. semipartitum (Sow.), 0. subundulatum (Portl.), 

 0. tenuicinctum (Portl.), 0. tenuistriatum (Munst.), 0. vagans (Salt.), 0. ventricosum 

 (Sharpe), 0. annulatum (Sow.), 0. arcuoliratum (Hall), 0. bilineatum (Hall), 0. ibex 

 (Sow.), 0. subannulatum (Munst.), 0. tracheale (Sow.), as well as 0. baculiforme and 

 0. tenuiannidatum, which are figured as new (PI. I., L). Also Poterioceras pyriforme 

 (Sow.) and P. ellipticum (M'Coy) ; Phragmoceras intermedium (M'Coy) and P. ventri- 

 cosum (Sow.); Lituites articulatus (Sow.) and L. cornu-arietis (Sow.); Trocholites 

 planorbiformis (Conrad) and T. anguiformis, figured as new ; and Hortolus giganteus 

 (Sow.) and H. ibex (Sow.). To this fasciculus is added an Appendix A, called 

 " Descriptions of a few Species from Wales and Westmoreland referred to in the 

 foregoing work," by J. W. Salter. In this are described, some being figured on the 

 above-mentioned plate, Orthoceras vagans (Salter), 0. dimidiatum (Sow.), 0. torquatum 

 (Miinster), 0. primcevum (Forbes), 0. ventricosum (^Sharpe), 0. ibex (Sow.), Lituites 

 planorbiformis (Conrad), L. cornu-arietis (Sow.), and the two new species, Orthoceras 

 baculiforme and Lituites anguiformis. We thus have double and differing descriptions 

 of the same specimens in many cases. 



1853. — Strickland, " On the Distribution and organic Contents of the Ludlow 

 Bone-bed, in the districts of Woolhope and May Hill/' Quart. Journ. Geol. Soc, 

 vol. ix. p. 8, records Orthoceras semipartitum from this bed. 



1853. — Sedgwick, " On a proposed Separation of the so-called Caradoc Sand- 

 stone into two distinct groups, viz. (1) May Hill Sandstone, and (2) Caradoc Sand- 

 stone," Quart. Journ. Geol. Soc, vol. ix. p. 215, records 0. annulatum from May 

 Hill Sandstone. 



