t^^l

PABEEXSIA. 157
form of the hinder edge of the shell contrasts strongly with the
inflated form of the central portion. Anterior and posterior
cicatrices confluent, apical ones under the cardinal tooth."
The variety sometimes attains a considerable size, a specimen
in the Indian Museum collection from the Chittagong Hills
having the following dimensions :—
Long. 43-25, lat. 70, diam. 27 mm.
Yar. nagpoorensis {Lea); Simpson, Washington, DC, Smiths.
Inst., Nat. Mus. Proc. xxii, 1900, p. 842; H. & T., C. I. p. 21,
pi. 45, fig. 3.
Unio nagpoorensis, Lea, Proc. Acad. Nat. Sci. Philadelphia, iii,
1859, p. 331; Jourii. Acad. Nat. Sci. Philadelphia, iv, 1860,
p. 270, pi. 45, fig. 150; Obs. Genus Unio, vii, 1860, p. 88, pi. 45,
lig. 150; Blanford, J. A. S. B. xxxv, 1866, p. 143.
Margaron ( Unio) nagpoorensis, Lea, Syn. 1870, p. 38.
Unio corrugatus, Miill., var. nagpoorensis, II. &T., 0. I. 1876, p. 21 ;
P*tel, Conch. Sam. 1890, p. 149.
Original desa'iption :—Testa Ifflvi, subtriangulari, subinflata,
inssqiiilaterali, postice hiangalata, antice rotunda ; valvulis suhtenuibus,
antice crassioribus; natibus prominentibus, epidermide
rufo-fusca, striata eradiata, dentibus eardinalibus parvis, compressis,
obliquis, crenulatis, in utroque valvule duplicibus ; lateralibus
longis, lamellatis curvisque; margarita salmonis colore
paulisper tincta et iridescente.
Hai. Ambajari Tank, Nagpoor, Bengal (C. M. Wheatley).
Specimens in the Indian Museum Collection are locahzed as
follows :—Poona ; Gudur; Madras Presidency {G. H, Tipper) ;
Grodavery River.
The dimensions of an average specimen are: long. 30, lat. 46,
diam. 22*75 mm.
291. Parreysia (Parreysia) wynegungaensis {Lea).
Parreysia (Parreysia) loynegungaensis (Lea); Simpson,Washington,
D.O., Smiths. Inst., Nat. Mus. Proc. xxii^ 1900, p. 842.
Unio wynegungaensis, Lea, Proc. Acad. Nat. Sci. Philadelphia,
1859 (1860) p. 331; Obs. Genus Unio, vii, p. 89, pi. 45, fig. 151;
Blanford, J. A. S. B. xxxv, 1866, p. 143; Sowerhy, Conch.
Icon, xvi, 1868, pi. 67, p. 339; Ptetel, Conch. Sam. iii, 1890,
p. 172.
Margaron (Unio) tvynegungaensis, Lea, Syn. 1870, p. 50.
Original description:—Testa isevi, elliptiea, inflata, msequilaterali,
postice sub-biangulata, antice oblique rotundata; valvulis
subcrassis, antice crassioribus ; natibus prominentibus, ad apices
valde divaricate undulatis ; epidermide luteo-oliva, micante, obsolete
radiata ; dentibus eardinalibus subcrassis, suberectis, valde
crenulatis, in utroque valvulo duplicibus ; laterah'bus sublongis,
crassis subrectisque ; margarita salmonis colore paulisper tincta et
iridescente.