t^^l

158 TjiTioNiDa;.
Hah. "WynegUHj;a Eiver, 30 miles east of Nagpoor, in the
Deccan, Bengal (C. M. Wheatley).
The following localities are attached to specimens in the Indian
Museum Collection :—Damuda ( W. T. Blanford) ; Surat; Sambalpur
; Godavery River ( W. T. Blanford); Barod, about 130 miles
S.W. of Sepree.
The dimensions of three average specimens are as follows:—
No. 1 being those of the specimen figured by Hanley in the
' Conchologia Indica,' and now in the British Museum Collection.
Lat
Diam
1.
29
42
17-25
2.
33-25
51
19-5
292. Parreysia (Parreysia) favidens [Benson).
3.
36 mm.
55 mm.
21 mm.
Parreysia (Parreysia) favidens (Benson); Simpson, Washington,
D.C., Smiths. Inst., Nat. Mus. Proc. xxii, 1900, pp. 842-813.
? Mya spuria, Wood, Ind. Test. 1825, p. 12, pi. 2, iig. 85 a.
Unio favidens, Benson, A. M. N. II. x, 1865, p. 188 ; J. A. S. B. xxxv,
1867, p. 138; H. & T., 0. 1. 1876, p. 6, pi. 11, fig. 1; Keeve,
Conch. Icon, xvi, 1865, pi. 26, iig-. 131; Pastel, Conch. Sam. iii,
1890, p. 152.
Margaron {Unio) favidens. Lea, Syn. 1870, p. 38.
Uniojlavidens, Protel, Coneh. Sam. iii, 1890, p. 152.
Unio trirostris, Musgrave, Hanley, Phot. Conch. 1863, pi. 2, flg. 9;
II. & T., 0. I. 1876, p. 6, pi. 11, flg. 6; Paitel, Conch. Sam. iii,
1890, p. 170.
Unio tripartitus, Lea, Proc. Acad. Nat. Sci. Philadelphia, vii,
1863, p. 190; Journ. Acad. Nat. Sci. Philadelphia, vi, 1866,
p. 57, pi. 19, fig. 55; Lea, Obs. Genus Unio, xi, 1887, p. 61,
pi. 19, fig. 55.
Margaron (Unio) tripartittis, Lea, Syn. 1870, p. 35.
Unio smaraffdiies, Benson, A. M. N. H. x, 1862, p. 190; Blanford,
J. A. S. B. X.XXV, 1806, p. 347 ; H. & T., 0.1. 1876, p. 5, pi. 10,
fig. 5 ; Pajtel, Conch. Sam. iii, 1890, p. 167.
Original description :—Testa transverse ovata, insequilaterali,
crassa, subtumida, antice rotundata, postice subalata, deelivi,
angulata, demum obtusa, margine ventrali convexiusculo; disco
insequaliter sulcato; epidermide olivaceo-fiisca, versus marginem
ventralem luteo-olivacea, postice viridi paree fasciata ; umbonibus
tumidis, promineBrtibus, decortieatis, sulcis radiatis angulatoflextiosis
indiitis; lunula impressa, elliptica, decorticata; ligamento
elongato; carina umbonali Iseviuscula, linea unica vix
elevata notatfi,; dentibus cardinalibus crassis, fortiter radiatoruo-osis,
lateralibus obliquis, elongatiusculis, valvre dextrse duplicibus,
sinistra subtriplicibus; margarita pallide lutea iridescente.
Long. 45, lat. 66, diam. 30 mm.
Hab. Upper Ganges.