290 Records of the Indian Museum. [Vor. VII, 
fig. 304,—Margaron (Unio) occatus , Lea, Syn., 1870, p. 31,—=Umnio 
mactlentus, Benson, Ann. Mag. Nat. Hist., Ser. 3, 1862, p. 187; 
Hanley and Theobald, Conch. Ind., p. 5, pl. x, figs. 2, 4; p. 62, 
pl. cliv, fig. 5,=—Unio rugosus, Hanley and Theobald, Conch. 
Ind. p62 -spl elivsie ee! 
Saharanpur, Reg. No. 2555; Phenchooganj, Sylhet, Reg. 
No. 5140; Barrack River, Cachar, Reg. No. 59+8; Cachar, Reg. 
No. 2582 ;. Myadong, Upper Burma, Reg. No. #992 ; North-East 
Cachar, Reg. No. #156; Pegu, Burma (W. Theobald), Reg. No. 5998 
and 5 meat Saharunpur, United Provinces (J. Wood-Mason), Reg. 
No. #297; Wurda, Central Provinces (W. T. Blanford), Reg. No. 
5205 - Bhamo, Upper Burma, Reg. No. #198; Calcutta (G. Nevill), 
Reg. No, 599+. 
31. Nodularia (Nodularia) pachysoma (Benson), Simpson, 
Syn. Naiades, Proc. U.S. Nat. Mus., XXII, p. 813,—Unio pachy- 
soma, Benson, Ann. Mag. Nat. Hist., X, 1862, p. 186; Hanley 
and Theobald, Conch. Ind., 1876, p. 6, pl. xii, fig. 1,—Margaron 
(Unio) pachysoma, Tea, Syn., 1870, p. 63,=Unio pachystoma, 
Paetel, Conch. Sam., III, 1890, p. 162. 
Sawaddy, Burma (J. Anderson), Reg. No. 2425; Burma (W. 
1 
Theobald), Reg. No. +5155; Assam (Robinson), Reg. No. 5159; 
Irrawaddy (J. Anderson), Reg. No. 529°; Calcutta; Reg. Nos. °°*% 
and (N. Annandale) +742; Berhampur (R. E. Lloyd), Reg. No. 
4747, 
32. Nodularia (Nodularia) chaudhurii, sp. n. 
Shell small, rather thin, elongately ovate, pale olive, covered 
with a finely laminiferous periostracum ; both valves concentrically 
striate, sculptured with irregular, minute, nodulous, radiate ridges 
which appear posteriorly as regular corrugations; umbones small, 
somewhat prominent; dorsal margin slightly arched; ventral 
margin straight; anterior side produced, rounded; posterior side 
bluntly rostrate, abruptly sloping above and below; hinge-teeth 
elongate, anteriorly projecting; anterior scars deep, roundly 
triangular; posterior scars scarcely impressed; interior of shell 
iridescent, nacreous, posteriorly corrugate. 
Long. 12°75; lat. 23 mm. 
Hab.—Upper Burma, Reg. No. 2545 [Type]. 
33- Nodularia (Nodularia) bonneaudi (Eydoux), Simp: 
son, Syn. Naiades, Proc. U.S. Nat. Mus.,- XXII, p. 813,—Uznio 
bonneaudi, Kydoux, Mag. de Zool., 1838, pl. 119, figs. I, Ia; 
Hanley and Theobald, Cat. L. and F. W. Shells, Brit. Ind.; pp. 48, 
49; Hanley and Theobald, Conch. Ind., pl. x, fig. 6,—Margaron 
(Unio) bonneaudi, Lea, PyAD ce DP: S2rule7O pits 0s 
Pegu, Reg. Nos, 2376, 5101, 2425, soos: eevee) Burma, 
Reg. Nos +5279 and (W. e ’Blanford) 6; Zayleyman, Upper 
Burma (J. Anderson), Reg. No. +5202; nas Reg, No, 5185; 
Bhamo, Reg. Nos. 5197 and (J. Anderson) 5114; Tenasserim (W. T. 
Blanford), Reg. No. 59:9; Myadong, Upper Burma, Reg. Nos. 
