104 TESTACEOUS MOLLUSCA. 
subcordate, rather thick, solid, smooth, pale brown, with unequal 
white rays; anterior slope punctulate: lunule lanceolate, purple 
brown ; inside white, the margin purplish: posterior lateral tooth 
short, conical, close. 2+. 
C. Apicauis.—CuionE A. Gray in Analyst, 1838. Oblong, 
subcordate, rather thick, solid, smooth, yellowish white, with a few 
arrow-shaped pale brown spots above. Umbones reddish brown: 
inside white. 
C. Bicotor.—Trigona B. Gray in Analyst, 1838. Triangue 
lar, equilateral, rather compressed, whitish or pale fawn-coloured, 
pellucid: slopes flattened, the interior stained internally with 
purple, ventral edge scarcely arcuated ; lunule large, well-defined, lan- 
ceolate ; inside flesh-coloured teeth as in Planulata. +..1.—Africa. 
C.Punrcura. Gray in W.S.t.2.f.16. Ovate heart-shaped, 
moderately convex, thickish, posteriorly grooved ; polished, variable 
in colouring, usually pale buff with livid fawn-coloured rays and 
marblings : anterior slope with dark chestnut transverse waved 
lines: lunule elongated heart-shaped : inside stained with purple, 
margin entire. 1. 13.—S. Seas. 
C. Lusprica Brod. Z. P. 1835. Rounded heart-shaped, 
glossy, rather violet, anteriorly with obtusely concentric sub-elevated 
lines, which are small and close at the umbones, but wider and 
more distant as they recede: inside white. 12..145.—C. 
America. 
C. Rosga. Brod. and Sow. Z. J. 4.—Beechey. Zool. t. 43. f. 
7. Obliquely cordate, subcompressed, purplish-rosy, concentrically 
grooved, posteriorly with distant lamelle, anteriorly with very short 
broadish spines; inside white. 1 3,.. 144).—Pacific.—Bears 
much resemblance to a spineless Dione ; usually with a white ray 
on each slope. 
C. Torruvosa. Brod. Z. P. 1835. Obliquely heart-shaped, 
anteriorly somewhat lobed, white slightly timged with chestnut 
towards the umbones, with numerous blunt and coarse anteriorly 
irregular concentric lines. 14..13.—Panama.—Variety.  Ele- 
gantly and sub-radiatingly painted with rufous and rose-colour. 
C. Squatipa. Sow. Z P. 1835. Ovate subcordate, thickish, 
smooth, pale brown, with sometimes irregular darker spots ; epi- 
dermis brown: anterior side the longer and subacuminated near 
the ventral portion.-—Variety. With two rays. (Birapsata. Sow. 
in B.echey. Z t. 43. f. 5.) 2..245.—W. Columbia.—Not 
unlike Maculosa. 
C. HirroctyrnHica. Conr. Jour. A. N.S. Piil. 7. p. 253. 
t.19. f. 22. Sub-triangular, with concentric striz distinct only 
at the margins ; (white, often with brown triangular spots ;) an- 
teriorly longer, sub-cuneiform and rounded at the extremity : lunule 
cordate, defined by an impressed line. 1.—Sardwich Isles. 
