t^^l

COUBICTJLA. 221
to the outer margins, the umbones themselves being of a reddish
colour; anterior side short, broadly rounded; posterior side
broad, somewhat truncate ; vertical transverse section narrowly
corilate ; horizontal contour almost cordate ; umbones large, fairly
prominent, nuich eroded ; anterior margin somewhat curved,
rounded, gradually passing into the ventral margin; ventral
margin slightly arched ; posterior margin strongly curved, separated
from the ventral margin by a distinct!)' marked, somewhat
rounded angle ; ligament short, somewhat thick ; liganiental sinus
very shallow, slightly notched, elongate ; interior of shell dull,
except at the outer margin where it is polished, violet coloured ;
hinge margin rather narrow, bearing three cai'diiial teeth, the two
posterior comparatively strong, grooved above, the third or
anterior one very weak; lateral teeth long, somewhat curved ;
muscle scars very shallow ; mantle scar distinct.
Long. 21, lat. 22, diani. 14 mm.
Hah. ? India.
Type in Sandberger Coll., Wiirzburg.
361. Corbicula indica, Clessin.
Corbiciila indica, Clessin, in Martini & Dliemnltz, 1879, pp. 143-144,
pi. 25, figs. 21-28.
Shell of medium size, slightly inflated, solid, somewhat inequilateral,
with glossy, strongly ribbed surface, the ribs somewhat
close and acute, covered with an olive-green periostracum and
painted with dark spots ; growth stria) not distinct; anterior side
somewhat shortened and pointed, posterior side slightly elongated,
truncate; umbones large, scarcely prominent, very slightly recurved,
eroded ; vertical longitudinal section broadly lanceolate ;
vertical transverse section very narrow, cordate; horizontal contour
triangularly ovate ; anterior margin somewhat roundedly pointed ;
lower margin strongly curved ; posterior margin forming a somewhat
broad and short beak considerably roundedly (ingled on both
sides ; escutcheon and lunule scarcely visible ; ligament short,
fairlf strong and prominent; ligamental sinws short, shallow'
triangular; interior of shell dull, the outer margin only slightly
polished, tinged with violet, dorsal or hinge-margin white ;
cardinal teeth not divergent; lateral teeth very elongate and
finely ribbed, equally strong over their whole length, the anterior
much stronger than the posterior ; muscle and maptle scars both
shallow.
Long. 23, lat. 28, diam. 15 mm.
Hub. ? India.
Type in Gruner Coll., ISTo. 518.
862. Corbicula regia (Benson MS.), Clessin
«^w& MAW ->- • —g— y^ j-j .
Corbicula regia (Benson MS.), Clessin, i in Martini & Chemnitz,
1879, p. 267, pi. 43, fig. 5.
Shell small, ovate, solid, much inflated, very inequilateral, with