BIVALVIA. 223 
TELLINA DEPRESSA. Penn. Brit. Zool., ed. 4, vol. iv, p. 87, pl. 47, fig. 27. 
PSAMMOBIA VESPERTINA. Lam. An. ss. Vert., t. 5, p. 511, 1818. 
— _ Phil. En. Moll. Sic., vol. i, p. 22; vol. ii, p. 21. 
— —_— Lovén. Ind. Moll. Scand., p. 42, 1846. 
— — Sism. Syn. An. Inv. Pedm, Foss., p. 21, 1847. 
PsSAMMOCOLA VESPERTINA. Blainv. Malac., p. 77, fig. 4, 1825. 
SANGUINOLARIA — Flem. Brit. Anim., p. 460, 1828. 
Cuama Lurescens. ist. Hist. Conch., t. 417, fig. 261. 
AZOR VARIABILIS. ‘‘ Leach.’ Ann. Mag. Nat. Hist., vol. xx, p. 272. 
Spec. Char. Testa oblongo-ovatd, subinequilaterali, concentrice striatd, striis obtusis 
depressis; antice rotundatd, postice subtruncatd ; margine subtilissimé crenulato. 
Shell ovately oblong, slightly inequilateral, concentrically striated, striae obtuse, 
depressed ; anterior side rounded, posterior somewhat truncated; margin very finely 
crenulated. 
Length, 2 inches. Hetght, 1 inch. 
Locality. Cor. Crag, Ramsholt and Sudbourn. 
Recent, Mediterranean, British, and Norwegian Seas. 
A very few specimens only of this elegant species have fallen under my observa- 
tion. I have no hesitation in assigning the smaller shell (fig. 2, ¢, d), found at Rams- 
holt, as an identity with the recent British species. Fig. 2, a, 4, is the representation 
of a specimen found by myself at Sudbourne, and the only difference appears to be in 
its having somewhat larger proportions, this one measuring as much as 23 inches 
in length, and 13 inch high; and our fossil is in all probability only a monstrous form 
of the existing shell. It strongly resembles Psam. Stangeri, Gray, ‘Faun. of New 
Zealand,’ p. 273, No. 179. 
3. PSAMMOBIA TELLINELLA, Lamarck. Tab. XXII, fig. 4, a, 4. 
PSAMMOBIA TELLINELLA. Lamk. Hist. des. An. s. Vert., v, p- 515, 1818. 
_— — Forb. and Hanl. Hist. of Brit. Moll., vol. i, p. 277, pl. 19, fig. 4, 
and Animal, pl. x, fig. 1, 1848. 
— — Lovén. Ind. Moll. Scand., p. 42, No. 303, 1846. 
— _ Alder. Cat. Moll. North. and Durh., p. 89, 1848. 
— FLORIDA. Turt. Brit. Biv., p. 86, pl. 6, fig. 9, 1822. 
Spec. Char. Testa transversd, ovato-oblongd, tenui ; transversim striatd ; anticé ovato- 
rotundatd ; posticé subangulatd ; margine ventrali leviter arcuato ; cardine bidentato, altera 
unidentato, sinu palliari profundo. 
Shell transverse, ovately oblong, thin, very finely striated transversely ; anterior 
side slightly rounded, posterior somewhat angulated; ventral margin slightly curved ; 
hinge with one tooth in one valve, inserted between two in the other; palleal sinus 
deep. 
