208 CRETACEOUS LAMELLIBRANCHTA. 



Bemarks. — The examjiles of Toucasia Lonsdalei are m the condition of internal 

 casts in a ferruginous sandstone, so that it is difficult to compare this with other 

 species. The casts show a considerable amount of variation in form. D'Orbigny, 

 de Loriol, and Pictet and Campiche included Bcquienia carinata, Matheron,' from 

 the Urgonian of Orgon, as a sj'nonym of Sowerby's DIceras Lonsdalei; but Prof. 

 Douville- and M. Paquier^ think that the identity of the two forms is doubtful 

 and can only be determined by a careful comparison of English specimens witli 

 internal casts of T. cnrinnta. Prof. Douville *^ suggests that there is a resemblance 

 between T. Seunesi and T. Lonsdalei. 



Type. — The type, which is stated to have come from near Calne, cannot now 

 be found. The specimen from which Woodward's outline figure was drawn is in 

 the British Museum, No. 88825. 



DlstriliKtion. — Lower Greensaud of Stock Orchard, south of Calne. Recorded 

 by Morris from Lockswell Heath, south-west of Calne. 



Famil ij— MO^OFhFAmiBJE, Fischer. 

 Genus — Gyropleura, 7/. Ihnirdl', 1887. 



('Bull. Soc. gt'ol. (le France,' ser. 3, vol. xv, p. 7()8.) 



GYRorLEUifA coRNUCopi.K {d'Orhiijii //), 1847. Plate XXXIII, fig. 7 a, Ik 



1847. Chama coRNUoopiiE, A. J'Orhujny. Pal. Fniuc. Terr. Cret., vol. iii, p. 689, 



pi. cecclxiv, figs. 3 — 7. 

 18r,0. — — tl'Orhicjny. Prodr. (le Pal, vol. ii, p. 170. 



1 808. — — F. J. Pictet and G. Campiche. Terr. Crut. do Ste. Croix 



(Mati'r. Pal. Suisse, ser. 5), p. 7. 

 1871. — — F. Htoliczlca. Paloeout. ludica, Cret. Faima S. India, 



vol. iii, p. 234. 

 1887. Gyropleura — //. Douville. Bull. Soc. jjfrol. de France, ser. 3, vol. 



XV, p. 771, fig. 3. 



Bemnvls. — ^^vo s]K'ciniens rroui llic Clilorit ic i\I;ii'l of Dorset agree in i'onu 

 with e.\aiuj)le.<i of (!. cornucoina.' from tlie Cenomanian of Houen (the locality 



1 ' Catal. Foss. des Bouclics-du-Ilhoiie' (1842). p. U)4, pi. ii, figs. 1,2; Cajirotina Lonsdalii, 

 d'Orbiguy, ' Auu. Sci. Nat. Zool.,' ser. 2, vol. xvii (1842), j). 180; liecpiienia Lonsdalii, d'Orbiguv, 

 'Pal. Franc. Terr. Crot.,' vol. iv (18.50), p. 248, pis. dlxxvi, dlxxvii ; Caprvlinn Lonsdalii, de Loriol, in 

 Favrc, ' Rcch. gi'ol. dans Savoio,' vol. i (18()7), p. 38(i, pi. C, fig. 22; licfjuicnla Ldn.^dalii, Pictot and 

 Campiche, 'Terr. Cri't. Ste. Croix' ('Mater. Pal. Suisse,' ser. 5, 1868). p. 14, pi. clxi. 



2 'Bull. Soc. gcol. de Franco,' ser. 3, vol. xvii (188!»), p. 630. 



^ 'Les Rudistcs Urgouieus,' I (' Mrin. Soc. gi'ol. de France,' i'aK'out. XI, 11)03), p. 41. 

 * Op. cit., p. 632. 



