43 
DONAX. WED G E-SHELL. 
3. Donax complanata. Flat Wedge-shell. 
Lister, pi. 384. f. 227— Montagu, pi. 5. f. 4. 
Shell oblong, smooth, glossy, with often a few faint di¬ 
stant transverse strife, but no longitudinal ones: color 
yellowish or purplish, often covered with a polished skin, 
with white streaks or spots, and a single broad whitedon- 
gitudinal ray from the beaks to the margin, the edges of 
which arc ferruginous; inside purple, with the margin 
plain: teeth small; beaks nearer one end: length live 
eighths of an inch ; breadth an inch and a quarter. 
From D. Tranculus it may be readily distinguished, bv 
the more flattened form, the single white ray, and more 
especially by the plain and smooth margin. 
Devon, Dorset, and Cornish coasts : very rare, v , m. 
4. Donax plebeia. Plebeian JVedge-shell . 
Lister , pl.389. f. 228— Montagu, pi. 5. f.2— Dorset Cat. 
pi. 5. f. 13. 
‘ Shell oblong, somewhat oval, thick, strong, smooth, 
glossy, udth a few distant transverse furrows, dull yellow¬ 
ish horn-color, rarely white, with generally two longitu¬ 
dinal brown rays from the beaks to the margin; inside 
glossy and paler, with the margin smooth: beaks near one 
end; teeth remarkably large and strong, with a single la¬ 
teral one ; length hardly half an inch 5 breadth three quar¬ 
ters. 
Weymouth, and North Britain: very rare. v. m. 
5. Donax castanea. Chesnut Wedge-shell. 
Montagu, pi. 17- f. 2. 
Shell strong, glossy, smooth, with a few irregular 
transverse wrinkles : color chesnut, with a single darker 
longitudinal ray, curving from the back to the larger end, 
and dividing each Valve into two nearly 'equal parts, the co¬ 
lor becoming paler towards the posterior end; inside the 
same color, with A slight trace of the ray at the margin, 
which is smooth: beaks obtuse, rather inclining to the 
longer side, with one of the teeth Very large, the other 
small, without lateral ones. 
It differs from the last, in the obliquity of the teeth, which 
are bent in a recurred manner and are hot furnished with 
■ t • lateral 
