THE 



GEOLOGICAL MAGAZINE. 



NEW SERIES. DECADE III. VOL. VIII. 



No. XI.— NOVEMBER, 1891. 



(D:ElT.C3rXJSr.A.Xj J^S-TIOXjIES. 



I. — On PleUROXAUTILUS [_NaUTILUS'] N^0D0S0-CARmATUS,'R6M'EB., sf. 

 By Arthur H. Foord, F.G.S. 



THEOUGH the kindness of Mr. A. C. Seward, MA., F.G.S., the 

 British Museum has been put in possession of a fine specimen 

 of this interesting species, collected by him in the Millstone Grit of 

 Caton, Lancashire. The species is thei"e found associated with 

 NaiifiJus l^Pleiii-onautilusI armatus, J. de C. Sowerby,^ Solenocheihis 

 [^Nautilus] latiseptatus, de Koninck,^ Acfinoceras [_Orthoceras] sulca- 

 tnlum, M'Coy,^ etc. These I have identified in a small collection 

 submitted to me by Mr. Seward. 



Fleuronmitilus nodosa -carinaf us. — a, lateral view, showing the ornamentation of the 

 test ; b, peripheral view, showing the deep median furrow, and the septa in the 

 lower half of the figure, where the test is absent, a, drawn from the original 

 specimen in the Woodwardian Museum, Cambridge ; b, from a specimen 

 presented to the British Museum (Nat. Hist ) by A. C. Seward, Esq., M.A., 

 F.G.S. Both figures are about two-fifths the natural size. 



From the Carboniferous Limestone, Caton, Lancashire. 



' In Prestwich, Geology of Coalbrookdale, Trans. Geol. See. ser. ii. vol. v. pt. iii. 

 p. 492, pi. xl. fig. 8, 1840. 



2 Faune du Calcaire Carbonifere de la Belgique (Ann. du Mus. Eoy. d'Hist. 

 Nat. de Belgique, torn, ii.), p. 110, pi. xxii. figs. 1-3 ? 1878. 



3 Synop. Garb. Foss. Ireland, p. 8, pi. i. fig. 4, 1844. 



DECADE III. — VOL. VIII. NO. XI. 31 



