JURASSIC AND TRIASSIC BRACHIOPODA. 169 



Terebratula Royeriana, tfOrb. Geol. de la Russie d'Europe, vol. ii, 3rd part, 



pi. xlii, figs. 33—38, 1845. 



— — Oueranger. Repert. Paleontol. de la Sarthe, p. 24, 1853. 



— — Cotteau. Etudes Moll. Foss. de l'Yonne, p. 135, 1857. 



— — Oppel. Die Jura- Form., p. 571, 1857. 



— umbonella, E. Beslong. Bull, de la Soc. Linn, de Normandie, t. iv, 



p. 242, 1859. 



— — E. Deslong. Mem. de la Soc. Linn, de Normandie, vol. xi, 



1859. 

 Waldheimia — /. F. Walker. Geol. Mag., p. 572, 1875. 



We are indebted to Mr. J. F. Walker for the discovery of this species ? or variety of 

 W. lagenalis in the Kelloway Rock of Scarborough Castle Hill. 1 When, in 1850, I was 

 examining Lamarck's species of fossil Terebratula, I was struck with the strong resem- 

 blance between T. umbonella and certain specimens of Schlotheim's species. I then 

 stated " one specimen shows the deltoidal area, while in others the umbo of the ventral 

 valve touches the beak ; this is visible in our specimens of T. lagenalis." I think it, 

 however, if not a distinct species, at any rate a well marked variety. This seems to be 

 likewise the opinion of Mr. E. Deslongchamps, although he retains it as a distinct species. 

 He observes " cette espece, connue depuis long-temps, varie un peu dans sa forme plus ou 

 moins allongee, plus ou moins comprimee, plus ou moins bombee vers les crochets. Elle 

 se rapproche beaucoup des Ter. lagenalis et ornithocephala, dont elle se distingue par sa 

 forme plus arrondie et plus regulierement convexe. Tres caracteristique des couches 

 moyennes du Callovien, elle a ete souvent observee ; d'Orbigny et, d'apres lui, beaucoup 

 de Geologues l'ont cite sous la denomination de Ter. Royeriana; mais, outre qu'elle 

 avait un nom depuis long temps, elle a ete confondue par d'Orbigny avec la Ter. 

 biappendiculata, comme j'ai pu m'en assurer en visitant sa collection." 



This species replaces in the Kelloway Rock the W. lagenalis of the Cornbrash. In the 

 Boulonnais it occurs at the base of the Oxfordian series, where it was found in great 

 abundance by Mr. Bouchard. Mr. Deslongchamps states it to be very common in the 

 ferruginous beds of the Callovian at Montbizot, at Balon, and Beaumont (Sarthe) ; 

 at the hillock of the Bois d'Auge and Exmes (Orne), &c. ; at Koroskovo, near Moscow, 

 and Orembourg (Russia). 



148. Waldheimia lampas, Sow., sp. Sup., PI. XXII, figs. 3, 4, 5, 6. 



Terebratula lampas, Sow. Min. Con., tab. ci, fig. 3, 1815. 

 Waldheimia — /. F. Walker. Geol. Mag., p. 574, 1876. 



At p. 41 of my ' Oolitic Monograph' I stated that " Terebratula lampas is merely an 



1 ' On the Distribution of the Brachiopoda in the Oolitic Strata of Yorkshire ;' Communications to 

 the Monthly Meetings of the Yorkshire Phil. Soc, 1877. Mr. Walker states that this variety of 

 W. ornithocephala is thicker than the last-named species from the Fuller's Earth Rock. 



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