260 MOLLUSCA FROM THE CRAG. 
Spec. Char. Testa ovato-oblongd, transversd, convexiusculd, tenui, subequilateral, 
antice rotundatd, posticé truncatd, et angulatd; punctis minutissimis asperatd ; callo 
hgamentifero magno. 
Shell ovately oblong, transverse, slightly convex, thin, subequilateral, anterior side 
rounded, posterior truncated and angulated, exterior minutely granulated; hinge with 
large projecting callus, divided by a ridge. 
Length, 23 inches. He/ght, 24 inches. 
Locality. Cor. Crag, Sutton and Gedgrave. 
Clyde Beds. Smth. Recent, Britain and Aigean. 
A thin and fragile shell, not very rare, but difficult to obtain. Like most of the 
specimens of this genus found in the Crag, they are somewhat distorted from com- 
pression, and one or other of the valves in consequence cracked, thereby altering a 
little the natural appearance of the shell. On closely comparing it with the existing 
species, it may be remarked that the left valve is rather less contracted,—that is, the 
ventral margin is more convex, or not so straight, as in the living shell, and the umbo 
apparently less prominent; but the few specimens that I have seen are all pushed a 
little out of their natural position, and these trifling differences would probably 
disappear in a larger and better series. 
2. THRACIA PHASEOLINA, Lamarck. Tab. XXVI, fig. 2, a—e. 
Mya peciivis. Twurt. Conch. Dict., p. 98, 1816. 
ANATINA DEcLIvis. Jd. Brit. Biv., p. 47, 1822. 
—_— puBescEens. Id. Brit. Biv., p. 45, t. 4, fig. 3 (young). 
AMPHIDESMA PHASEOLINA. Lamk. Hist. Nat., tom. v, p. 492, No. 11, 1818. 
THRACIA PHASEOLINA. einer. Coq. viv. Thracia, pl. 2, fig. 4. 
— — Phil. En. Moll. Sic., vol. i, p. 19, t. 1, fig. 7, 1837. 
ODONCINETA PAPYRACEA. Da Costa. Test. Sicil., p. 23, pl. 2, figs. 1—4, 1829. 
THRACIA PHASEOLINA. Ford. and Hanl. Hist. of Brit. Moll., p. 221, pl. 17, figs. 5, 6; 
and pl. # (animal), fig. 4, 1848. 
_ 7 Couth. Bost. Journ. Nat. Hist., p. 147, 1839. 
— — Lovén. Ind. Moll. Scand., p. 46, No. 321, 1846. 
TELLINA PAPYRACEA. Poli. Test. Sicil., t. 15, fig. 18. 
Spec. Char. Testa elongato-ovald, transversd, subequilaterah, tumidiusculd, tenui ; 
antice rotundatd, postice truncata ; margine ventral convexiusculo. 
Shell elongato-ovate, transverse, nearly equilateral, thin, and fragile ; anterior side 
rounded, posterior truncated; ventral margin slightly rounded. 
Length, 1 inch. Height, } inch. 
Locality. Cor. Crag, Sutton. 
Recent, Britain, Mediterranean, Scandinavia. 
Small specimens are by no means rare at Sutton; and as the recent conchologists 
profess to have sufficient evidence for the separation of this from the young of 7’ 
