BARBATIA., 43 
Measurements : 
Length . ; . ‘ ; : ; : . 33 mm. 
Height. : F : : . : ; EAD. gs 
Remarks.—There are two internal casts of left valves from Cuckhamsley in 
the Montagu Smith Collection, Woodwardian Museum, which, in general form, 
agree with A. Galliennei, d’Orbigny, except that they are proportionately shorter. 
Distribution.—Chalk Rock (zone of Heteroceras Reussianuwm) of Cuckhamsley. 
Barzatia? sp. Plate VII, figs. 13 a, b. 
1897. Arca, sp., H. Woods. Quart. Journ. Geol. Soe., vol. li, p. 379, pl. xxvu, 
fig. 4. 
Description.—Shell elongate, oblique, very inequilateral. Anterior margin 
forming an angle with the hinge-line, and curving ventrally to join the ventral 
margin, which is nearly straight, but has a considerable slope posteriorly. 
Posterior margin oblique, somewhat rounded. Umbones apparently sharp, 
pointing anteriorly ; shell compressed dorsal to a line between the umbo and the 
postero-ventral extremity. Surface with well-marked lines of growth; radial 
ribs extend from the umbo posteriorly, and perhaps occur also on other parts of 
the shell. 
Measurements : 
Length . : ; ; : ‘ . : . 13mm. 
Height . : : . , : : : ; 6.5 
Remarks.— This form is at present known by one specimen only, an internal 
cast, but showing indications of ornament. It resembles Arca strehlensis, Geinitz,! 
from the Pliner-Kalk of Strehlen (Dresden), but in that species the shell is less 
oblique, and the surface is generally smooth except on the anterior part, which 
is marked with radial ribs. 
Distribution —Chalk Rock (zone of Heteroceras Reussianum) of Cuckhamsley. 
1“ Das Elbthalgeb. in Sachsen”’ (‘ Paleontographica,’ vol. xx), pt. 2, 1873, p. 56, pl. xvi, fig. 5. 
