1002 NODULARIA 
Umo olivarins Loa, Tr. Am? Phil SocehV> 1830 pce. op 
xvI, fig. 38; Obs., I, 1834, p. 118, pl. xvi, fig. 38—HANLEy, 
Biv. Shells, 1843, p. 195, pl. xx, fig. 32—CuHeENu, II. 
Conch:, 1858, pl? viii; figs: ia aie, rb. — Koster Comen: 
Cab. Unio, 1861, p. 244, pl. Lxxx, fig. 2.— Sowerby, 
Conch. Icon., XVI, 1866, pl. xXxxvi, fig. 195.—HANLEy and 
THEOBALD, Conch. Ind., 1876, p. 5, pl. x, fig. I. 
Margarita (Unio) olivarius Lea, Syn., 1836, p. 26; 1838, p. 
20; 
Margaron (Unio) olivarius LEA, Syn., 1852, p. 30; 1870, p. 47. 
Nodularia olivaria SIMPSON, Syn., 1900, p. 817. 
Unio pumilio Kuster, Conch. Cab. Unio, 1862, p. 268, pl. xc, 
fin, 
A very delicate species remarkable for its faint, radial sculp- 
ture and milky tint within and without. 
NopuLARIA THEOBALDI Preston. 
“Shell ovately rectangular, very slightly curved, gaping 
anteriorly, moderately solid, concentrically striate, covered with 
a dark, olivaceous periostracum; umbones small, not prom- 
inent; dorsal margin somewhat arched; ventral margin slight- 
ly excavated in the median region, otherwise straight ; anterior 
side slightly produced and somewhat sharply rounded; pos- 
terior side very obtusely rostrate, steeply sloping above, then 
sharply rounded and again sloping inwards below. Cardinal 
teeth in right valve roughly triangular, jagged, somewhat in- 
wardly projecting, fitting between two teeth in the left valve, 
which are roughened and of which the anterior is rather broad 
and massive; lateral teeth in both valves elongate and nearly 
straight ; anterior scars somewhat deeply excavated, especially 
above ; posterior scars ovate, lightly impressed ; interior of shell 
nacreous, shading from pale flesh-color to bluish, iridescent, 
especially towards the posterior margin. 
Long. 34, lat. 60, diam. go mm.”’ (Preston). 
Type locality, Manipur, Assam. 
Nodularia (Nodularia) theobaldi (Nevill, MS.), Preston, 
Rec. Ind. Mus., VII, 1912, p. 202. j 
