TRIBE NYMPHACEA,. 
(oe 
D. Brcotor. Lam. i3.-—-An. D. Brconor. Gel. no. 16 
— Gualt. t. 88. f. 5.—List. t. 392. f. 231. Ovate, we eae 
whitish stained with brown, with a few longitudinal striz, decus- 
sating still fewer transverse ones : anterior end with waved and curled 
furrows: spotted with violet within Mauritius or India. 
D. Virrata. Lam. 14.—Del. t. 6. f. 12.—D. Brrapiata and 
Sexrapiata. W. S. Ovate, rather depressed, with transverse 
groove-like striz ; whitish with a very few rufous rays, which en- 
large as they approach the margins.— Mediterranean.? 
D. Lessont. Desh. H.3.p. 99. no. 15. Triangular, smooth, 
depressed, sub-equilateral, pale fulvous with numerous brown in- 
terrupted rays, and the apex acute: within brownish white, and the 
margin quite entire and gaping at one end: one of the lateral teeth 
very long, the other indistinct.— Chili.—Tolerably large, and the 
length and breadth nearly equal. 
D. Corgutorwes. Desh. HL. 3. p. 99. no. 18. Triangular, 
gibbous, equilateral, polished and heart-shaped : pink with elegant 
waved or angulated reddish yeilow transverse lines ; brownish red 
within. 
D. Eautzatera. Sow. Tank. Cat.—D.Venreroiwea. Gray. 
—Venus Donacina. Ch. f. 1983, 4. Sub-triangular, sub- 
equilateral, the slopes nearly straight, ventral edge arcuated and 
ascending towards the anterior and longer extremity; strong, con- 
vex, white covered with angular sub-reticulated markings of ochra- 
ceous brown and obsoletely rayed : dise smooth, sides with distant 
concentric grooves: anterior slope rounded, towards the beaks 
edged with radiating sub-granulated striz, elsewhere smooth : inside 
white, margin entire, three approximate cardinal teeth in one valve, 
two and a rudimentary in the other; no lateral. 1..11.—S. Seas. 
D. Owen. Gray in B. M. _ Extremely elongated, 
smooth, polished; anterior side obliquely truncated and very 
short, its slope concentrically striated, and its dorsal edge 
much sloping ; broad white rays on a drab ground, a short narrow 
pressed and perfectly smooth ; anteriorly very short, very convex, 
with very fine radiating strize, which are very indistinct, except on 
the slope ; umbonal ridge angulated near the smooth beaks; ven- 
tral edge arcuated: inside stained with purple: receptacle of the 
lateral tooth very prominent. 14..2. 
2D. TriqueTra. Lam.15. Triangular, sub-equilateral, glossy, 
much swollen under the beaks, whitish with fine transverse striz, 
and a few vestiges of rays: and indistinct violet spot within. 3.— 
ae Holland. -~(A young variety of Cytherea Corbicula, 
esh.) 
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