VENUS. 
235 
jinely notched: beaks prominent, central, curved to one 
side, with a broad heart-shaped depression under them, 
which is often colored ; the cartilage side equally sloping in 
both valves, and forming a deep groove, often marked with 
colored streaks : length 3even-eighths of an inch ; breadth 
an inch. 
It much resembles the V. Paphia, but is more rounded, 
and the ridges are more flattened and irregular, not abruptly 
obsolete on the cartilage side, but reaching quite across the 
surface, and mostly projecting a little beyond the margin, 
giving the slope a tubercled or jagged appearance at the 
edges. From this last circumstance it corresponds exactly 
with Linne's V. succincta: “ rima excisa.” 
Sandy coasts of England and Ireland, v. v. 
S. Venus sulcata. Grooved Venus. 
Linn. Trans, viii. pi. 2. f. 2. 
Venus Danmonia. Montagu , pi. 29. f. 4. 
Shell rather flattened, roundish, a very little angular and 
produced at the anterior side, covered with a dark chesnut 
or olive green tenacious skin, under which it is glossy- 
white, with numerous regular equidistant rounded concen¬ 
tric ribs, from twenty-five to thirty in number, which are 
narrower then the spaces between them, and both them¬ 
selves and the spaces quite smooth or obscurely striate 
transversely: these ribs grow fainter towards the sides, 
especially the cartilage side where they sink into a kind of 
wrinkles; beaks very prominent, pointed, curving to one 
side, with a deep elongated heart-shaped depression under 
them, which is sometimes covered with a blackish skin ; 
inside white or cream-color, rather rough and not polished, 
except round the margin which is finely notched : in one 
valve a strong thick somewhat triangular and fiattish tooth, 
with a deep cavity on each side, the others small and re¬ 
mote ; in the other valve two strong remote teeth, with a 
large and deep hollow between them for the reception of 
the strong central tooth of the opposite valve : length 
about an inch ; breadth rather more. 
Opportunities of comparing numerous specimens, col¬ 
lected in various parts of Ireland and on the Devonshire 
coast, have satisfied us that the Venus sulcata and V. Dan- 
monia 
