SO BRITISH CRETACEOUS BRACHIOPODA. 



surface and elevated plicated front. Bh. limbata is, however, very nearly related to B. 

 Octoplicata, Sow., of which it may perhaps only constitute a marked variety, in which the 

 greater portion of the surface is either entirely smooth, or indistinctly plicated, except 

 towards the front and lateral margins. In 1833, a small race, almost completely circular 

 in shape, and of the dimensions of a flattened pea, was named Ter. lentiformis by 

 Woodward. 



In the ' Pal. Franc' vol. iv, p. 46, M. D'Orbigny considers the name subplicata to be 

 a synonyme of Bh. octoplicata; but in p. 48 of the same work, he admits the species to be 

 distinct, and in both cases refers to Dr. Mantell's name and figure. Bh. limbata abounds 

 in the Upper Chalk of many localities, always associated with Bh. octoplicata (Sow.). It 

 has been collected at Norwich, in Kent, Sussex, in Ireland, at Meudon and Chavot 

 (France), &c. Ciply, in Belgium, is the locality from which Faugas's figured specimen 

 was obtained, &c. 



Plate XII, figs. 1, 2, 3. Specimens from the Norwich Chalk, in the collection of Mr. 



Fitch; fig. 1, enlarged. 

 „ figs. 4, 5. Young specimens, or a dwarf race {Ter. lentiformis, Woodward). 



36. Rhynchonblla compressa, Lamarck, Sp. PI. XI, figs. 1 — 5, and PI. XII, fig. 25. 



Tebebbatula compkessa, Lamarck. An. sans Vert., vol. vi, p. 256, No. 54, 1819; 



and Davidson, " Notes on an Examination of the La- 

 marckian Species of Fossil Terebratulce," Annals and 

 Mag. of Nat. Hist., June, 1850, pi. xv, fig. 54. 



— diffobmis, Lamarck. Ib.,vol.vi, No. 48, 1819 (Encycl. Meth., pi. 242, 



fig. 5, 1789) ; and Dav. lb., June, 1850, pi. xv, fig. 48. 



— dimidiata., Sowerby. Min. Con., tab. 277, fig. 5, 1821. 



— — Parkinson. An Introd. to the Study of Organic Remains, 



p. 234, 1822. 



— Gallina, Brong. Desc. Geol. des Environs de Paris, p. 84, pi. ix, fig. 2, 



1822. 



— eoMPEESSA, Befrance. Die. des Sc. Nat., vol. liii, p. 158, 1828. 



— dimidiata, Fleming. A Hist, of British Animals, p. 372, 1828. 



— diffobmis, Befrance. Die. Sc. Nat., vol. liii, p. 160, pi. v, fig. 3, 1828. 



— dimidiata, Woodward. Synoptical Table of Br. Organic Remains, p. 21, 



1830. 



— diffobmis, Beshayes. Encycl. Meth., iii, p. 1029, No. 22, 1832. 



— alata, V. Buck. Class, des Terebratules, Mem. Soc. Geol. de France, 



vol. iii, p. 150, pi. xv, fig. 21, 1834. 



— compbessa, Beshayes. Nouv. Ed. de Lamarck, vol. vii, p. 345, No. 54, 



1836. 



— dilatata, Sowerby, in Fitton. Trans, of the Geol. Soc. of London, 



vol. iv, p. 343, pi. xviii, fig. 2, 1836. 



— diffobmis. Bes. Nouv. Ed. de Lamarck, vol. vii, p. 343, No. 48, 1836. 



— dimidiata, Morris. Catalogue, 1843. 



