4
SOLENIDiE.
two-thirds cover the ventral or front part of the shell, and
radiate from the beak, the rest occupying the whole of the
posterior side, and diverging from an angle formed by a junction with the first-mentioned set of striae ; this angle varies
from acute to obtuse, according to the number of stria3 ; the
anterior side is not thus striated ; the surface is also covered
with minute and crowded longitudinal striae resembling those
observable in species of Pmmmohia : colour pale yellowishwhite : epidermis like oil-skin, yellowish T^ith a brown tint in
aged specimens : margins slightly incurved in front, obliquely
truncated with a rounded contour at each end, nearlj' straight
behind and parallel with the front, except in the middle, where
the beak forms a projection equal to the indentation on the
opposite side : heahs pointed and nearly straight : ligament
chrysalis- shaped, prominent, dark horncolour : hinge-line
straight : hinge-plate thick and strong, reflected over the
ligament and abruptly truncated at the posterior end : hinge
supported by a strong oblicjue shelf-like rib : teeth, in the right
valve two blunt cardinals curving upwards from below the
beak, the posterior being much larger than the other ; the
left valve has a similar cardinal on the anterior side, besides a
short, triangular and oblique lateral on the posterior side:
inside chalky- Avhite, with a slightly nacreous gloss in some
parts, incipient pearls being occasionally formed on the
inner edge of the mantle ; margin blunt : pallial scar well
defined ; sinus oblong, and extending two-thirds across the
transverse diameter of the shell : muscular scars distinct; anterior irregularly pear-shaped, posterior triangularly oval.
L. 0-9. B. 1-0.
Yar. ohlonga. Shell narrower in proportion to its breadth.
Habitat : In sand, between low-water mark at spring
tides (Lukis), and various depths seawards, from 20
to 85 fathoms, on different parts of the coast from the
Shetland to the Channel Isles, but local ; more common
in Bantry Bay than elsewhere. Var. 1. Guernsey
(Lukis) ; Polkernow Cove, Cornwall (Miss Lavars)
;
Shetland (Barlee) .
Believing it to be the SoJen multistriatus of Scacchi, I find it recorded as a fossil from the
neighbourhood of Antwerp, and from Gravina in Apulia.
Lamarck and Brocchi appear to have mistaken a white
SOLENIDiE.
two-thirds cover the ventral or front part of the shell, and
radiate from the beak, the rest occupying the whole of the
posterior side, and diverging from an angle formed by a junction with the first-mentioned set of striae ; this angle varies
from acute to obtuse, according to the number of stria3 ; the
anterior side is not thus striated ; the surface is also covered
with minute and crowded longitudinal striae resembling those
observable in species of Pmmmohia : colour pale yellowishwhite : epidermis like oil-skin, yellowish T^ith a brown tint in
aged specimens : margins slightly incurved in front, obliquely
truncated with a rounded contour at each end, nearlj' straight
behind and parallel with the front, except in the middle, where
the beak forms a projection equal to the indentation on the
opposite side : heahs pointed and nearly straight : ligament
chrysalis- shaped, prominent, dark horncolour : hinge-line
straight : hinge-plate thick and strong, reflected over the
ligament and abruptly truncated at the posterior end : hinge
supported by a strong oblicjue shelf-like rib : teeth, in the right
valve two blunt cardinals curving upwards from below the
beak, the posterior being much larger than the other ; the
left valve has a similar cardinal on the anterior side, besides a
short, triangular and oblique lateral on the posterior side:
inside chalky- Avhite, with a slightly nacreous gloss in some
parts, incipient pearls being occasionally formed on the
inner edge of the mantle ; margin blunt : pallial scar well
defined ; sinus oblong, and extending two-thirds across the
transverse diameter of the shell : muscular scars distinct; anterior irregularly pear-shaped, posterior triangularly oval.
L. 0-9. B. 1-0.
Yar. ohlonga. Shell narrower in proportion to its breadth.
Habitat : In sand, between low-water mark at spring
tides (Lukis), and various depths seawards, from 20
to 85 fathoms, on different parts of the coast from the
Shetland to the Channel Isles, but local ; more common
in Bantry Bay than elsewhere. Var. 1. Guernsey
(Lukis) ; Polkernow Cove, Cornwall (Miss Lavars)
;
Shetland (Barlee) .
Believing it to be the SoJen multistriatus of Scacchi, I find it recorded as a fossil from the
neighbourhood of Antwerp, and from Gravina in Apulia.
Lamarck and Brocchi appear to have mistaken a white