IOIO NODULARIA 
Contradens dimotus fischerianus Haas, Conch. Cab., Unio, 
1912, pl. 19, fig. 8. 
Morlet states that the pseudocardinals are but slightly in- 
dicated. ‘The shell appears to be nearly smooth and devoid of 
folds or nodules. 
NopULARIA ANODONTAFORMIS (‘lapperone-Canefri). 
Shell large, subrhomboid, subsolid, inequilateral, somewhat 
inflated ; beaks high and full; anterior end subangulate above, 
rounded below ; base lightly curved, full a little behind the mid- 
dle; from the inflation to the hinder point the outline is 
straight ; posterior ridge well developed, rounded, ending near 
the base of the shell in a blunt point or feeble biangulation ; 
dorsal slope strongly and obliquely truncate; surface with ir- 
regular, concentric sculpture and faint indications of nodulous 
or zigzag sculpture; epidermis reddish-brown, olive-tinted on 
the umbonal region, sometimes with a very wide, nearly black 
posterior ray, shining; left valve with a compressed, ragged 
pseudocardinal and two remote, delicate laterals; right valve 
with two pseudocardinals and one lateral; dorsal scars large 
and conspicuous ; anterior scars irregular; posterior scars shal- 
low; pallial line sometimes having indications of a posterior 
sinus ; nacre whitish, brownish, iridescent behind. 
Length 121, height 64, diam. 43 mm. 
New Guinea. 
Unio (Microdontia) anodonteformis ‘TAPPERONE-CANEFRI, 
Ann. Mus. Genoy., XIX, 1883, p. 295, pl. x1, figs. 3-5. 
Nodularia anodontefornus Simpson, Syn., 1900, p. 818. 
Microdontia anodonteformis Haas, Con. Cab., Unio, 1910, pl. 
TO) 112210, 
A fine, large species, of which four matched valves are be- 
fore me. ‘The beaks of all these are somewhat eroded, but 
it is probable that they have but slight sculpture. The nacre 
is slightly thickened in front. 
NopULARIA OVA'A (Haas). 
“Shell almost equilateral, high, solid. Outline elliptical, 
showing only at the hinder end a blunt angle. Beaks almost 
central, situated at 41/too of the length, rather prominent and 
