1912. | H. B. Preston: The Asiatic Naiades. 303 
Singbhoom, Reg. No. +889; Chittagong, Reg. No. +872; Arrah 
Reg. No. +895; Burma, Reg. No. 2585; Hazrapur, Reg. No. 479; 
Rangoon, Reg. No. 2195; Bhamo, Upper Burma (J. Anderson), 
Reg. No. 253°; Tank near Bangalore, Reg. No. 2°12; Tezpur, Reg. 
No, 2532; Dacca, Reg. No. 4891; Toungoo, jeve ene Reg. No. 2437; 
Bhagalpur (Capt. Sherwill), "Reg. No. #878; ‘‘a stream two miles 
north of Guddur, Madras Presidency ” (G. H. Tipper), Reg.. Nos. 
S110, siiss ‘S from the little ‘ nuddy ’ at Barod, S. W. of Sepree, 
about 130 miles,’ Reg. Nos. *982, soa1; “‘from a jheel near 
Rohri, Sind,” Reg. No. +2988; Irrigation Channels, Seistan, Reg. 
Nos. 2241 and #814; pope ay Reg. Nos. 5998 and 5923; Karnul Dis- 
trict. Madras, ‘Reg. Nos. £947 and 5938; Calcutta, Reg. Nos: 2554, 
4886 (distorted specimens), ws06 (very young Speco Belgachia, 
Calcutta (N. Annandale), Reg. Nos. #739, ; Loc? (Indian 
Tanks), Reg. Nos. +729 and 5199; Patna, oe Ne. 49003 Bandar- 
daha, Berhampur, Bengal (B. I. Chaudhuri), Reg. No. 2234; 
Silcuri, Reg. No. +8; Barrack River, Silchar, Reg. ‘No. Bierce t) 
Cachar, Reg. No. +8°*; Igatpuri, Western Ghats (Museum ‘Collec- 
tor), young specimens, Reg. No. +72#; Putna, Mirzapur District, 
U.P. (R. Hodgart), Reg. No. #259. 
76a. Var. obesus (Hanley and Theobald), Simpson, Syn. 
Naiades, Proc. U. S. Nat. Mus., XXII, p. 855,=Umo marginalis 
var. obesa, Hanley and Theobald, Conch. Ind., p. 20,: pl. xiii, 
fig. 3, ?Unio corrianus, Sowerby, Conch. Icon., XVI, 1868, pl. 
Ixxvii, fig. 41. 
Chittagong, Reg. No. 5934; 
Toungoo, Burma, Reg. No. 2526 
76b. Var. tricolor (Hanley and Theobald), Simpson, Syn. 
Naiades, Proc. U.S. Nat. Mus., XXII, p. 855,—Unto tricolor, Kuster, 
Conch. Cab. Unio., 1856, p. 156, pl. xlv, fig. 1,.=Unio marginalis 
var. tricolor, Hanley and Theobald, Conch. Ind., p. 20, pl. xliii, 
fig. 5. 
Shuaygoomyo, Reg. No. 2583 ; Manbhoom, Reg. No. +593, 
76c. Var. candaharicus (Hutton),—Lamellidens marginalis 
var. candaharicus (Hanley and Theobald), in Simpson’s Syn. Naiades, 
Proc. U. S. Nat. Mus., XXII, p. 855,=Unio marginalis var. canda- 
harica, Hanley and Theobald, Conch. Ind., p. 20, pl. xliii, 
fig. 4,=Unio marginalis var. kandaharica, Hutton, in Theobald’s 
Cat. L. and F. W. Shells, Brit. Ind., p. 46,—Umio candaharicus, 
Hutton, Jl. As. Soc. Beng., XVIII, Pt. 2, 1850, p. 660. 
Kandahar (Hutton), Reg. No. +291; Kandahar, Reg. No. 
76d. Var. thwaitesi, Lea,—Lamellidens thwaitest, Tea, in 
Simpson’s Syn. Naiades, Proc. U.S. Nat. Mus., XXII, p. 856,— 
Unio thwattest, Lea, Proc. Ac. Nat. Sci., Philad., III, 1859, p. 152; 
}ie-sead. Nat-Set, Philad IV, 1860, p. 246, pl. -xxxwiieie 125, 
—Margaron (Unio) thwaitest, Lea, Syn., 1870, p. 41,—=Unio conso- 
brinus, Hanley and Theobald, Conch. Icon., p. 19, pl. xli, fig. 7. 
Ceylon, Reg. Nos. 5048, 4718 ; Colombo, Reg. No. 495+, 
Silchar, Cachar, Reg. No. #852 ; 
b) 
