1912. ] II. B. Preston: The Asiatic Natades. 299 
No. 2495, also Reg. No. +798; Seven Tanks, Calcutta, Reg. No. 2523; 
Arrah, Reg. Nos. 2517 and 4821; Rajmahal, Reg. No, 2470; Hazra- 
pur, Reg. No. 2498; Ranigunge, Reg. No. 4824; - Sunderbunds, 
Reg. No. 2488; Phenchooganj, Central Sylhet (a ’ variety), Reg. 
No, 4858. 
62a. Var. pinax (Benson), Hanley and Theobald, Conch. 
Ind., p. 6, pl. x, fig: 2,—Unio pinax, Benson, Ann. Mag. Nat. 
Hist., 1862, Dt 192: Jl. As. Soc. Beng., XX XV, 1866, p. 144. 
iene (Asiatic Society of Bengal), Reg. No. 2447; Arrah, 
Pes NOs: 
O20. 2 Var: plagiosoma (Benson), Hanley and Theobald, Conch. 
Maden 0, Dla x. figs 35——U 1120 plagiosoma, Benson, Ann. Mag. 
Neeetist., <p. 2Oks)Jazas. ooc, Beng., XX XV, 1866, p. 144. 
Patna, Pee No. 5197; Langlai, Assam, Reg. Nos. 2578 and 
2180; Alipur, Calcutta (J. Anderson), Reg. No. 252+; Birbhum 
Bee u 7ood-Mason), Reg. No. 245+. 
62c. Var. chrysis (Benson), Ann. Mag. Nat. Hist., Ser. 3, X 
p. 189; Hanley and Theobald, Conch. Ind., pl. xli, fig. 3. 
Ratha, Res No. 2252" 
1 
62d. Var. deltae (Benson), Ann. Mag. Nat. Hist., Ser. 3, X, 
.89; Hanley and Theobald, Conch. Ind., pl. xlii, fig. 2, 
Hazrapur, Reg. Nos. 250s ‘and ° sos; Calcutta, Reg. No. 2451, 
62e. Var. irridula (Benson), ney Mage Nate Hist. Ser. 3, 
Xie 180. 
Bengal, Reg. No. 2451; Damuda, Reg. No. **°3; Manbhoom, 
Reg. No. 2454; Gunduk (Asiatic Society of Bengal), Reg. 
No. 2%"; Ranigunge, Reg. No. 2452; Patna, Reg No. 2453. 
62/. Var. assamensis (Nevill, MS.), var. n. 
Shell more convex than the typical form, the dorsal margin 
is rather less posteriorly angled, the anterior side more rounded 
aud the posterior slightly more nasute. 
Hab.—Digong, Reg. No. =172 [Type]; Assam, Reg. Nos. 250 
2511 and 248s; Arrah (Asiatic See of Bengal), Reg. Now 
Sylhet, Reg. No. 2455. 
63. Parreysia smaragdites (Benson),—Uwmo smaragdites, 
Benson, Ann. Mag. Nat. Hist., 1862, X, p. Igo. 
Bhamo, Upper Burma (J. Anderson), Reg. Nos. 2157, 470s; 
Zayleyman Upper Burma (J. Anderson), Reg. No. 2445; Zayley- 
man, Reg. No. 2992; Loc? (J. Anderson) Reg. No. +109. 
64. Parreysia bhamoensis (Theobald), Simpson, Syn. Nai- 
goes broe. WasaNat. Mis. XXIT; p..843,—=Uso bhamoensis, 
Theobald, Jl. As. Soc. Beng., XLII, 1873) 0b. Zoe ZOE pl. 
xvii, fig. 1,=Umnio mandelayensis, Theobald, jl. As. Soc. Beng., 
XLII, Pt, 2;:p..206, pl. xvii, fig. 2. 
Mandalay, Upper Burma, Reg. Nos. *°%* and (J. Anderson) 
2571; Sheinmagah, Upper Bena Reg. No. 2589; Irrawaddy 
