MOLLUSCA. 
100 
small primary tooth in each valve, and also two lateral teeth in 
both valves ; sinus slightly heart-shaped at its superior extre- 
mity ; colour pale yellowish-white. 
At first I was disposed to consider this the young of A. 
crassa, but its want of a sinus, more regularly ovate form, the 
shape of the pallial sinus, and large bifid tooth, induced me to 
give it a new specific name. 
This shell was found at Newbigging, Northumberland, by 
Walter Calverly Trevelyan, Esq., and is in the splendid cabinet 
at Wallington, Northumberland. 
Genus 24 Tellina — Linnaeus. 
Shell compressed, transverse, subequivalve, inequilateral; pos- 
terior side usually rounded ; the anterior somewhat produced, 
or beaked and angular; anterior ventral margin with an irregular 
flexuosity ; generally with two cardinal teeth in each valve, but 
only one in some instances ; usually two lateral teeth in both 
valves, but sometimes only one, and for the most part remote 
from the primaries ; two distant muscular impressions ; pallial 
impression with a very large sinus ; ligament external. 
1. Tellina depressa, pi. XL, f. 12. 
Tellina depressa, First Ed., pi. 16, f. 12; Mat on and Rackett, 
p. 51 ; Brown, Wernerian Mem., II, p. 507 ; Donovan, V, pi. 
163; Turton, Biv., p. 104, pi. 8, f. 6; Tellina squalida, Mon- 
tagu, p. 56 ; Fleming, p. 436 ; Bosempra squalida, Leach, 
MSS., p. 7- 
Shell flat, thin, transversely oblong-ovate; with a sinus in one 
valve, running from the umbones, and terminating on the basal 
margin, on the cartilarge or beaked side, in the left valve, with 
a corresponding elevation or ridge in the opposite valve ; car- 
tilage side terminating below in an acute angle or beak ; the 
other side beautifully rounded ; umbones very small, nearly 
central, and very slightly turned to one side ; colour pale or 
rich orange-yellow, sometimes nearly white, and when perfectly 
recent, are covered with a fine, thin, brownish epidermis ; 
whole surface finely, but not regularly, striated concentrically ; 
hinge with two primary teeth in one valve, and three in the 
other, one of which is somewhat remote, laminated at the base, 
and acute at the point; inside yellowish-white or orange-yellow; 
margins plain, and sharp. 
This very handsome species is found at Poole and Wey- 
mouth, Dorsetshire ; Dublin Bay and Portmarnock, Ireland. 
2. Tellina pdnicea, pi. XL, f. 13. 
Tellina punieea. First Ed., pi. 16, f. 13; Maton and Rackett, 
p. 50 ; Turton, Biv., p. 100; Fleming, p. 435 ; Tellina laeta, 
Montagu, p. 57 ; Tellina incequstriata, Donovan, IV, pi. 1 23 ; 
Tellina fragilis. Pennant, IV, p. 86, pi. 47, f. 26. 
Shell moderately strong, transversely oblong-ovate, much 
compressed, inequilateral ; umbones very small, hardly elevated 
above the hinge line ; one side subacute near the base, and the 
other well rounded ; surface glossy, pale yellow or skin-colour ; 
with numerous, strong, regular, rather open, concentric striae ; 
hinge with three teeth, the outer one on the anterior side bifid, 
the other exterior one broad, more remote, and placed some- 
what transversely oblique, holding an intermediate character 
between a primary and lateral tooth ; both valves with a very 
remote lateral tooth; margins plain, and sharp; inside pale pink 
or bluish-white. 
[CoNCHACEA. 
Found on the Dorsetshire coast, Portland, and at Guernsey; 
and my late friend Sir Patrick Walker found it on the shore at 
Leith. We met with dead shells with the valves united, by 
dredging, oS" Holy Island. These are in the cabinet of Lady 
Jardine. It may, however, be considered as a very rare British 
shell. 
3. Tellina striata, pi. XL, f. 15. 
Tellina striata. First Ed., pi. 16, f. 15; Montagu, p. 60, pi. 
27, f. 2; Maton and Rackett, p. 53; Turton, Biv., p. 106; 
Fleming, p. 436. 
Shell subtriangularly subovate, thin, subpellucid ; glossy, of a 
rosy or white-colour, darker towards the umbones, which are a 
little produced, placed nearly central, and slightly inflected; 
surface with numerous, very fine, concentric strise ; and by the 
aid of a strong lens, nearly obsolete, exceedingly minute, longi- 
tudinal streaks or striae are observable ; one side narrow, some- 
what beaked, and obliquely subtruncated ; the other beautifully 
rounded ; cartilage slope with a slight indentation ; inside rosy, 
particularly towards the umbonal region, and becoming paler 
towards the margins ; hinge with two remote, strong, laminated 
teeth. 
Found on the beach at Portland and Weymouth. Extremely 
rare. 
4. Tellina lineata, pi. XL, f. 17. 
Tellina lineata. First Ed., pi. 16, f. 17 ; Turton, Conch. 
Diet., p. 168, pi. 4, f. 16; Ib., Biv., p. 99, pk 7, f. 1 ; Fleming, 
p. 435. 
Shell semitransparent, transversely oblong-ovate, slightly pro- 
duced at one side, and rounded at the other ; umbones small, 
not quite central, and very slightly, if at all, reflected ; surface 
pale cream -white, with a pale red longitudinal stripe running 
close to the side in each valve; with numerous, fine, very close, 
regular, concentric striaa, which are strongest towards the sides; 
hinge with two cardinal teeth, one of them entire and the other 
cleft, and a lateral, laminar one on each side, in one valve, and 
a single, bifid, primary tooth in the other. 
Dredged by Dr. Turton in Teignmouth Bay. 
5. Tellina tenuis, pi. XL, f. 19. 
Tellina tenuis. First Ed., pi. 16, f. 19 ; Montagu, p. 59 ; 
Donovan, I, pi. 19, three lower figures; Turton, Biv., p. 107 ; 
Fleming, p. 436; Forbes, p. 46; Maton and Rackett, p. 52; 
Leach, MSS., p. 7 ; Tellina carnaria. Pennant, IV, p. 89, pi. 
49, f. 32, right hand figure. 
Shell transversely ovate, thin, much compressed, extremely 
fragile, subpellucid, and extremely glossy ; umbones small, 
nearly central, their inflection to one side being hardly per- 
ceptible ; the cartilage side somewhat produced, the other 
finely rounded; whole surface covered with extremely fine, 
somewhat irregular, concentric striae ; colour varying from 
pale skin-colour, white, citron-yellow, to carnations in almost 
all shades; sometimes plain, but for the most part with con- 
centric zones, of lighter or darker shades of the prevailing 
colour of the shell; hinge with two primary teeth in each 
valve, one of them with a slight lateral tooth ; inside glossy, 
and generally of the same hue as the external surface, but 
paler. 
This very beautiful shell is common on all the sandy shores 
of Britain and Ireland. 
