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LUTRARIA ? carinifera. 
" TAB. DXXXIV.—fig. 2. 
Spec. Cuar. Transversely oval, elongated, convex, 
longitudinally striated ; posterior side smooth, 
bounded by an obtuse carina, truncated, its 
edge straight. 
Axourt twice as wide as long: the surface is largely un- 
dulated ; the longitudinal striz do not cover much more 
than the anterior half of the valves, and even there are 
lost near the edge. 
A curious shell, the produce of the Lower Chalk at 
Dowlands. Drawn from a specimen in the cabinet of 
H. T. De la Beche, Esq. : 
——E—”E_E_—E 
LUTRARIA ? oblata. 
TAB. DXXXIV.—fig. 3. 
Spec. Cuar. Compressed, transversely oval, with 
obtuse extremities slightly bent ; umbones pro- 
minent. 
A smoortn but rather antiquated shell, nearly twice as 
wide as long: it has a small carina near the superior 
margin of the posterior side. The shell is curved to- 
wards the right valve; it has a deep sinus in the im- 
pression, left by the edge of the mantle, and has more 
the general aspect of Lutraria than of Anatina ; but we 
cannot decide to which genus it belongs. ‘The shell is 
pearly, which is rather a character of Anatina than Lu- 
traria. 
Discovered in the Sandstone of Bognor Rocks, and 
now in the possession of Thrupp, Esq. 
