42 CRETACEOUS LAMELLIBRANCHIA. 



Remarks. — I have seen only a few specimens — all internal casts — of this 

 species. 



Distribution. — Base of the Chalk Marl (zone of Schlambachia varians) of Lyme 

 Regis, and Titherleigh, near Chard. 



Barbatia, sp., cf. G-EiNiTzr (Reuss), 1844. Plate VII, figs. 10 a, b, 11. 



Cf. 1842. Aeca eadiata, H. B. Geinitz (non Goldfuss). Char, der Schicht. und 

 Petref. siichs-bohm. Kreidegeb., pt. 3, p. 78, pi. xx, figs. 

 13, 14. 



— 1844. — Geinitzi, A. E. Reuss. Geogn. Skizzen, vol. ii, p. 192. 



— 1846. — — — Die Verstein. der bohm. Kreideformat., 



pt. 2, p. 11, pi. xxxiv, fig. 31. 



— 1852. — — ? B. Kner. Denkschr. d. k. Akad. Wissensch. Math-nat. 



CI., vol. iii, p. 314, pi. xvi, fig. 27. 



— 1869. — — E. Favre. Moll. Foss. de la Craie des Envir. de Lemberg, 



p. 125, pi. xii, figs. 15, 16. 



— 1873. — — S. B. Geinitz. Das Elbthalgeb. in Sachsen (Palaeonto- 



graphica, vol. xx), pt. 2, p. 55, pi. xvi, figs. 7, 8. 



— 1889. — — A. Fritsch. Stud, im Gebiete der bohm. Kreideformat. 



iv. Die Teplitzer Schichten, p. 79, fig. 63. 

 1897. — (Baebatia), sp., cf. Geinitzi, H. Woods. Quart. Jouru. Geol. Soc, 



vol. liii, p. 378, pi. xxvii, figs. 5, 6. 



Measurements : 



Length (approximate) ...... 23 mm. 



Height ,, 11 5 j 



Remarks. — A specimen consisting of an internal and part of an external mould 

 appears to agree with A. Geinitzi in form, but seems to differ in possessing rather 

 finer ribs. It is, perhaps, the form figured by J. de C. Sowerby as Byssaarca 

 mnrullensis? from the Chalk of Kent. 



Distribution. — Chalk Rock (zone of Heteroceras Eeussianum) of Cuckhamsley. 



Barbatia, sp. Plate VII, figs. 12 a, b. 



Aeca, sp., cf. Galliennei, H. Woods. Quart. Jouru. Geol. Soc, vol. liii, p. 378, 



pi. xxvii, fig. 3. 



1 Sowerby {non d'Orbiguy), in F. Dixon's 'Geol. Sussex' (1850), p. 355, pi. xxviii, fig. 11. 1 

 have not been able to find the original of Sowerby's figure. 



