t^^l

138 VSIOl^DJE.
yellowish white ; hinge narrow, rather sinuous in the median part;
cardinal tooth lamellit'orm, carious somewhat oblique fitting into
the opposite valve between two small unequal teeth joined at
their base and denticulated above; posterior lateral tooth lamellit'orm,
sharp, inserted in the opposite valve between two lamellae,
quite as narrow as that of the left valve ; muscular scars subcircular,
the anterior rather deep, the-posterior very superficial.
Long. 22'5, lat. 40'5 mm.
Hab. Small streams and marshes of Bengal, it is found in great
profusion in the neighbourhood of Chandernagor.
268. Nodularia (Nodularia) shurtleflBana (Lea).
Nodularia (Nodularia) shurtleffiana (Lea); Simpson, Washington,
D.C., Smiths. Inst., Nat. Miis. Proc. xxii, p. 813.
Um'o shnrtlejjianus, Lea, Proc. Acad. Nat. Sci. Philadelphia,
viii, 1856, p. 94; Obs. on Genus TJnio, vi, p. 22, pi, 27, tig. 17 ;
Journ. Acad. Nat. Sci. Philadelphia, iii, p. 302.
Marffctron {TJnio) shtirtleffianus, Lea, Syn. WIO, p. 32.
Orkji-nol cJcscripttoii -.—Testa ininvite plicata, elliptica, insequilaterali,
subcylindracea, postice obtuse angulata, antice rotundata,
ad latus subplanulata ; valvulis subcrassis ; uatibus prominulis, ad
apices minute undulatis; epidermide rirido-lutea ; dentibus cardinalibus
sublongis, compressis geminisque; lateralibus longis
subrectisque; margarita salmonis colore tincta et viridescente.
Hah. Siria Eiver, India (Major Le Conte); Ahmednugger
(SJmrtleff).
There are also specimens in the Indian Museum which cannot
be separated from this species from Myadong and Shuaygoomyo,
Burma. It is of doubtful specific rank, unfortunately very few
specimens have been available for examination; probably, could a
large series be brought together, it would prove to be but a variety
of iV. ccerulea.
The dimensions of three specimens in the British Museuiri
vt'hich agree well with Lea's original figure and description are :—
1. 2. 3.
Long 24 22-5 20 mm.
Lat 44 44 35 mm.
Diam 14-25 15 12-75 mm.
269. Nodularia (Nodularia) occata (Lea).
Nodularia (Nodularia) occata (Lea) ; Simpson, Washington, D.O.,
Smiths. Inst, Nat., Mus. Proc. xxii, 1900, p. 813.
JJnio occatua, Lea, Proc. Acad. Nat. Sci. Philadelphia, ir, 1860,
p. 307; Jcxirn. Acad. Nat. Sci. Philadelphia, vi, 1863, p. 398,
pi. 50, fig. 304; Obs. on Genus Unio, x, 1863, p. 34, pi. 50,
fi?. 304.