BARB ATI A. 41 



Affinities. — Barbatia rotundata appears to be closely related to d'Orbigny's ' 

 Area Baspailli, but without seeing specimens of the latter, and with only one 

 example of the former before me, I am unable to determine their relationship. 

 B. rotundata is much smaller than the figured forms of A. Raspailli, and seems to 

 be proportionately more convex. 



B. Hugardiana (d'Orbigny) is proportionately longer and more coarsely ribbed. 

 B. Galliennei (d'Orbigny) is not so high posteriorly. 



Type. — Bristol Museum. This is the only specimen I have seen. 



Distribution. — Blackdown Greensand. 



Barbatia vendinensis (d'Orbigny), 1844. 



1844. Abca vendinensis, A. d ' Orbigny . Pal. Franc. Terr. Oct., vol. iii, p. 220, 



pi. cccxv, figs, 4 — 7. 

 1850. — — Prodr. de Pal., vol. ii, p. 104. 



1866. — — F. J. Pictet and G. Campiche. Foss. du Terr. Cret. 



Ste. Croix (Mater. Pal. Suisse, ser. 4), pt. 3, p. 474. 

 1S71. — — F. Stoliczka. Palsont. Indica, Cret. Fauna S. India, 



vol. iii, p. 343 (Barbatia). 

 ? 1897. — — A. Fritsch. Stud, im Gebiete der bobin. Kreideformat. 



vi. Die Chlosneker Schichten, p. 57, 

 fig. 63. 



An imperfect right valve from the Chalk Marl (Meyer's Bed 10) of Dunscombe, 

 in Mr. Meyer's Collection, probably belongs to this species. 



Barbatia Galliennei (d'Orbigny), 1844. Plate VII, figs. 9 a, b. 



1844. Akca Galliennei, A. d'Orbigny. Pal. Franc. Ten-. Cret., vol. iii, p. 218, 



pi. cccxiv. 

 1850. - — Prodr. de Pal., vol. ii, p, 104. 



1866. — — F.J. Pictet and G. Campiche. Fuss. Terr. Cret de 



Ste. Croix (Mater. Pal. Suisse, ser. 4), pt. 3, p. 473. 



1867. — F. Gueranger. Album Pal., p. 10, pi. xxi, fig. 4. 

 1871. — — F. Stoliczka. Palaeont. Indica, Cret. Fauna S. India, 



vol. iii, p. 343 (Barbatia). 

 1873. — — H. B. Geinitz. Das Elbthalgeb. in Sachsen (Palason- 



tograpbica, vol. xx), pt. 1, p. 220, pi. xlviii, figs. 

 20—22. 

 1S95. — F. Tiessen. Zeitsch. d. deutscb. geol. Gesellscb., vol. 



xlvii, p. 482. 



1 'Pal. Franc. Terr. Cret.,' vol. iii (1847), p. 766 (nom. unit.) ; ibid, (as A. Requieniana), p. 239, 

 pi. cccxxvi, figs. 1, 2; ' Prodr. de Pal.,' vol. ii (1850), p. 196, No. 137. 







