Concuacga.] 
6. Te.una Fasura, pl. XL, f. 18. 
Tellina Fabula, First Ed., pl. 16, f. 18; Donovan, III, pl. 
97; Montagu, p. 61; Turton, Biy., p. 101; Maton and Rackett, 
p- 52; Fleming, p. 435; Leach, MSS., p. 7; Brown, Wernerian 
Mem., II, p. 507. 
Shell transversely elongated, thin, pellucid, much compressed, 
and flexuous; anterior side narrowed and obliquely subtrun- 
cated, opposite side well rounded; umbones very small, nearly 
central, with a slight inclination to the cartilage side; colour 
generally white or pale yellow, frequently with a deeper tinge 
towards the umbones, and often exhibiting iridescent reflections; 
the left valve with very fine, regular, longitudinally diagonal 
strie, obliquing from the superior portion of the posterior side 
towards the base; the right valve quite plain, or with remote, 
irregular, concentric, obsolete striae; hinge with three teeth in 
the left valve, one of which is lateral, but not very remote 
from the cardinal ones; the right valve with only two cardinal 
teeth; inside smooth, glossy, white, with generally a darker 
tinge towards the hinge; margins plain, and very sharp. 
This shell is liable to some variety, the diagonal striz in vari- 
ous specimens only reaching a little more than half way along 
the posterior side. 
Distinguished from J. tenuis, by its more lengthened and 
more acute anterior side, and especially by the left valve being 
diagonally striate. The two species are frequently found mixed 
in cabinets. 
Inhabits many sandy bays in Britain and Ireland. 
7. Tevirna simiuis, pl. XXXIX, f. 35. 
Tellina similis, Sowerby, Brit. Miscell., p. 29, pl. 75; Mon- 
tagu, Sup., p. 167; Turton, Biv., p. 102; Fleming, p. 435. 
“Shell ovate, compressed; both valves diagonally striated 
five-sixths over the surface; beak not curved.’— Sowerby. 
Sowerby remarks that great similitude exists between this 
shell and the 7. Fabula, but differs in being rounded at the 
narrower side, and destitute of the curvature. and in both valves 
being diagonally striated. 
Found on the shores of Brighton, in company with Tellina 
Fabula. 
8. TELLINA ELLIPTICA, pl. XL, f. 20, 21. 
Tellina elliptica, First Ed., pl. 16, f. 20,21; Tellina planata, 
Pennant, IV, p. 87, pl. 48, f. 29. 
Shell elliptical, smooth, glossy, cream-white ; umbones small 
and acute, placed much to one side, which is a little contracted, 
the other ample and rounded; hinge with three cardinal teeth 
in each valve, but no lateral teeth; inside smooth, white, and 
glossy ; margins plain, and sharp. Length a quarter of an inch; 
breadth three-eighths. 
Found at Dunbar, by the late General Richard Bingham. 
9g. TELLINA PELLUCIDA, pl. XL, f. 22. 
Tellina pellucida, First Ed., pl. 16, f. 22. 
Shell transversely oblong-ovate, very pellucid; umbones con- 
siderably produced, placed much to one side, but not inflected ; 
anterior side very short; posterior side large, and elongated ; 
colour bluish-white; with numerous, very fine, concentric, 
nearly obsolete strie; hinge with two primary teeth in each 
_ yalve, but destitute of lateral teeth. 
Found at Seaton, County of Durham, by W. C. Trevelyan, 
Esq., and afterwards at Dunbar, by General Bingham. 
2c 
MOLLUSCA. 
101 
10. TELLINA soLipuLa, pl. XL, f. 14. 
Tellina solidula, First Ed., pl. 16, f. 14; Montagu, p. 63; 
Maton and Rackett, p. 58; Forbes, p. 46; Psammobia solidula, 
Turton, p. 95, pl. 8, f. 2; Fleming, p. 438; Tellina carnaria, 
Pennant, IV, p. 88, pl. 32, f. 32, left hand figure, and f. 32 4; 
Limecola solidula, Leach, MSS., p. 7. 
Shell strong, thick, convex, suborbicular; anterior side a little 
produced into a subacute beak, on which side the line from the 
umbo downwards is considerably more parallel than the other, 
and with a wide, longitudinal depression; posterior side well 
rounded; umbones placed nearly central, and rather blunted, 
hardly turning to either side; exterior surface dull, of various 
colours, yellowish-white, yellow, citron, flesh-colour, and rosy 
red; some plain, others banded or zoned; hinge with two small 
teeth in both valves; inside glossy, and of the same colours as 
Sometimes 
measures an inch in length; and an inch and a quarter in 
breadth. 
the exterior, but the tints in general more vivid. 
Inhabits most of the coasts of Britain and Ireland, and bur- 
rows in sand four or five inches beneath the surface. 
11. Tetiina Donacina, pl. XL, f. 16. 
Tellina Donacina, First Ed., pl. 16, f. 16; Montagu, p. 58, 
pl. 27, f. 3; Maton and Rackett, p- 50, pl. 1, f. 7; Turton, p- 
102, pl. 8, f.4; Fleming, p. 435; Tellina trifasciata, Pennant, 
IV, p. 88. 
Shell transversely oblong-ovate, thin, compressed, subpellucid ; 
umbones very small, placed much to one side; one side sub- 
truncated, short, and terminating in a short beak below; the 
opposite side much elongated, and rounded; basal line nearly 
parallel, or very slightly arcuated; surface of a pale gamboge- 
yellow, with numerous, fine, concentric strie, beautifully radi- 
ated, with interrupted rays of deep carnation; and also with 
transverse zones in many specimens; hinge with two teeth in 
one valve, that behind the umbo extending into a lateral lamina; 
and a single tooth in the opposite valve; inside smooth, glossy, 
generally of a rich yellow, and frequently with radiations cor- 
responding to those of the outside ; some specimens are nearly 
white, with, however, almost invariably a roseate mark below 
the umbones. General length about half an inch; breadth 
three-quarters. 
This is one of the most beautiful of our British bivalves, and 
inhabits sandy shores. Salcomb Bay, Devon; Sandwich, Wey- 
mouth; Dublin Bay, Portmarnock, and Bantry Bay, Ireland ; 
and the Friths of Forth and Clyde, Scotland. 
Genus 25.—PsamMMmosi1A.—Lamarck. 
Shell transverse, oblong, somewhat angular, gaping at each 
extremity, and covered with a thin, horny epidermis; with two 
short, bifid, cardinal teeth in the left valve, and one in the right 
valve; two distant, suborbicular, muscular impressions in both 
valves, situate near each end of the valve; pallial impressions 
with a very large sinus; ligament external, and supported upon 
a prominent fulcrum. 
1. Psammosra Ferrdensis, pl. XL, f. 1, 2. 
Psammobia Ferréensis, First Ed., pl. 16, f. 1, 2; Turton, 
Biy., p. 94; Fleming, p. 438; Forbes, p. 55; Maton and 
