9388 NODULARTA 
NoepuLARIA CHAUDHURII Preston. 
“Shell small, rather thin, elongately ovate, pale olive, covered 
with a finely laminiferous periostracum; both valves concen- 
trically striate, sculptured with irregular, minute, nodulous, 
radiate ridges, which appear posteriorly as regular corruga- 
tions; umbones small, somewhat prominent; dorsal margin 
slightly arched; ventral margin straight; anterior side pro- 
duced, rounded; posterior side bluntly rostrate, abruptly slop- 
ing above and below; hinge-teeth elongate, anteriorly project- 
ing; anterior scars deep, roundly triangular; posterior scars 
scarcely impressed; interior of shell iridescent, nacreous, pos- 
teriorly corrugate. 
Long. 12.75, lat. 23 mm.” (Preston). 
Type locality, Upper Burma. 
Nodularia (Nodularia) chaudhurti Preston, Rec. Ind. Mus., 
Wil 1912) p.-200: 
NopULARIA BONNEAUDI (Eydoux). 
Shell irregularly subrhomboid, much inflated, being decided- 
ly fullest in the middle, inequilateral, rather thin; beaks full 
and high; dorsal outline curved; anterior end narrowed, more 
full above; base line nearly straight to a remarkable swelling 
behind the middle, and rounded from the swelling to the 
hinder end; posterior ridge well developed, subangular, end- 
ing in a rounded point a little below the median line; dorsal 
slope decidedly and obliquely truncate; surface with fine, 
wrinkled sculpture, especially on the dorsal slope ; epidermis 
greenish, lightly banded with brownish; laterals delicate, 
curved; nacre bluish-white, brilliant. 
Length 43, height 24, diam. 19 mm. 
India. 
Unio bonneaudi Eypoux, Guer. Mag., 1838, p. 10, pl. cxrx, 
figs. 1, ta—Sowerpy, Conch. Icon., XVI, 1868, pl. xcv, fig. 
sts.—Hantxy and THroparp, Conch. Ind., 1876, p. 5, plex 
fig. 6.—ANpERsoN, Yunnun Exp., 1878, p. 900, pl. LXxx, 
figs. 8-12. 
