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 Schlanbachia varians) of Lyme 
Regis, and Titherleigh, near Chard. 
Barat, sp., cf. Gernirzt (Reuss), 1844. Plate VII, figs. 10a, b, 11. 
Cf. 1842. Arca rapiata, H. B. Geinitz (non Goldfuss). Char. der Schicht. und 
Petref. sichs-bohm. Kreidegeb., pt. 3, p. 78, pl. xx, figs. 
13, 14. 
— 1844. — Gernirzai, A. H. Reuss. Geogn. Skizzen, vol. ii, p. 192. 
— 1846. — _ — Die Verstein. der bohm. Kreideformat., 
pt. 2, p. 11, pl. xxxiv, fig. 31. 
— 1852, — — ? R. Kner. Denkschr. d. k. Akad. Wissensch. Math-nat. 
Cl., vol. iii, p. 314, pl. xvi, fig. 27. 
— 1869. — —  E. Favre. Moll. Foss. de la Craie des Envir. de Lemberg, 
p. 125, pl. xii, figs. 15, 16. 
— 1873. — — 4H. B. Geinitz. Das Elbthalgeb. in Sachsen (Palzonto- 
graphica, vol. xx), pt. 2, p. 55, pl. xvi, figs. 7, 8. 
— 1889. — — A. Fritsch. Stud. im Gebiete der bohm. Kreideformat. 
iv. Die Teplitzer Schichten, p. 79, fig. 63. 
1897. — (Barparta), sp., cf. Gernrrzt, H. Woods. Quart. Journ. Geol. Soc., 
vol. liii, p. 878, pl. xxvii, figs. 5, 6. 
Measurements : 
Length (approximate) d : : : : . 23 mm. 
Height z ee en er at hae eee 
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 Byssoarca 
marullensis,' from the Chalk of Kent. 
Distribution.—Chalk Rock (zone of Heteroceras Reussianum) of Cuckhamsley. 
Barzatia, sp. Plate VII, figs. 12 a, 6. 
Arca, sp. ef. Gatt1ennet, H. Woods. Quart. Journ. Geol. Soc., vol. lil, p. 378, 
pl. xxvii, fig. 38. 
1 Sowerby (non d’Orbigny), in F. Dixon’s ‘ Geol. Sussex’ (1850), p. 355, pl. xxvili, fig. 11. I 
have not been able to find the original of Sowerby’s figure. 
