Pvn H,i I'UitlS

398 TELLIXID.E.
P. Ferroensis was probably the Tellina trifasciata of
Linne, as Muller believed. According
to Loven it is
the T. incarnata of the ' Fauna Suecica/ but not of the
'
Systema Naturse/ It is strange
that Linne referred to
the same figure in Lister's f Historise animalium Angliae
tractatus" (App. t. 1. f. 8) both for T. incarnata and T.
trifasciata. That figure undoubtedly represents the pre-
sent species. It is the T. angulata of Born (but not of
Linne), T. incarnata of Pennant, T.radiata of Da Costa
(but not of Linne), T.fervensis and T. Bornii of Gmelin,
T. truncata of Spengler (but not of Linne), and (in its
immature state) the T. muricata of Renier; S. Wood
has noticed four other names given by palaeontologists.
4. P. vesperti'na *, Chemnitz.
Lux vespertina, Chemn. Conch.-Cab. vi. p. 72, t. 7. f. 59, 60. P. vesper-
Una, F. & H. i. p. 271, pi. xix. f. 1, 2.
Body suboval, elongated, yellowish-white : mantle finely
fringed : tubes long, and apparently rather wider than in P.
Ferroensis ; the branchial has six points at its orifice ; the
other is curved, and its terminal margin is irregular: gills
hanging obliquely from the dorsal range, of a brown colour,
rather coarsely pectinated; the upper pair are shorter and
smaller than the lower: palps triangular, elongated and
pointed, of a lighter colour than the gills, smooth on their outer
surfaces and distinctly pectinated within ; they are of equal
length, and each pair is connected with the other by
a mem-
brane surrounding the mouth : foot very large, broad, and
rather thick.
Shell of a form between oval and oblong, or partly rhom-
boidal owing to the angularity of the posterior side, compressed,
rather solid, opaque, more or less glossy when not covered by
the :
epidermis sculpture, numerous irregular and usually obscure
concentric ridges, which are more observable in large
the parallel and occasional lines
specimens near the margins ;
* Name derived from the similarity of the coloured streaks on the
shell to the rays of the setting sun.