1008 NODULARIA 
Unio laticeps von Martens, Nachr. Deutsch. Mal. Ges., 1900 
prors 
Contradens semmelinki laticeps HAas, Conch. Cab., Unio, 1912, 
pl..20; figs Sy:pl, arses 7, 
7; 
“Greatest diameter in ‘a’ decidedly, in ‘b’ only slightly behind 
the beaks.” 
NODULARIA HAGENI (Strubell). 
“Shell scarcely moderate, elongate-ovate, not at all ventri- 
cose, rather thin but quite solid, rudely costulate-striate, some- 
what shining, blackish-brown. Anterior end much attenuated, 
compressed ; posterior end elongate, the greatest height being 
at the junction of the dorsal and posterior margins. Dorsal. 
margin ascending, scarcely curved, meeting the posterior mar- 
gin at a distinct angle, passing in to the depressed anterior 
margin in a scarcely angulated curve; ventral margin sub- 
horizontal, forming with the obliquely descending, sub-bian- 
gulated posterior margin a straight, obliquely rounded-truncate 
rostrum. Umbones anterior, depressed, much eroded; areola 
almost obsolete; area elongate, compressed, indistinctly becar- 
inate; ligament thin, quite long. Hinge very weak; tooth of 
the right valve almost obsolete ; lateral elongate, narrow. Mus- 
cular and pallial impressions superficial; nacre bluish, livid- 
brown towards the umbones. 
Length 55, height 30, diam. 17 mm.” (Strubell). 
Type locality, South Sumatra. 
Microcondylea hageni STRUBELL, Nachr. D. Mal. Ges. 1897, 
p. 8. 
Contradens hagenit Haas, Conch. Cab., Unio, 1912, pl. 18, figs. 
Gi 7: 
NoDULARIA DIMOTA (Lea). 
Shell irregularly rhombeid, inflated, subsolid, inequilateral, 
narrowed and rounded in front; beaks full and considerably 
elevated ; posterior ridge double, ending in a biangulation near 
the base line; base line curved, fuller behind the middle; dor- 
sal slope obliquely truncate; surface usually more or less cov- 
ered with fine, subconcentric, slightly zigzagged sculpture, with 
