964 NODULARIA 
NoDULARIA PLICULOSA (von Martens). 
“Shell elliptic-oblong, inflated, epidermis brown or blackish, 
shortly rounded in front, elongate and obtusely subrostrate 
behind, sculptured with sparse, short, radiating, compressed 
folds, subparallel in the umbonal region, often interrupted and 
usually obliquely descending in front, zigzag posteriorly ; ven- 
tral margin straight in the young, slightly sinuous in the 
adults; posterior margin above slightly oblique, subtruncate 
in the middle, slightly ascending below. Nacre bluish. Car- 
dinal teeth compressed, rather stout, the anterior one of the 
left valve much elongated, those of the right valve are sub- 
parallel, the lower the stronger; lateral teeth long, slightly 
curved, smooth. / 
a) Length 45, height 22, diam. 15 mm. Beaks situated at 
1-4 of the length. [Ligament extending to 2-3 of the length. 
b) Length 33, height 15, diam. 10.5 mm. Beaks at 2-7 of 
the length. Ligament extending to about 2-3 of the length.” 
(von Martens). 
Type locality, (a) Singei in Southern Korea and (b) be- 
tween Okkwa and Changpyoeng, Northern Korea. 
Unio pliculosus von Marrens, S. B. Nat. Fr., 1894, p. 216.— 
Simpson, Syn., 1900, p. 862. 
Nodularia pliculosa Haas, Con. Cab., Unio, tg10, p. 76, pl. 
vil, figs. 7-11. 
NODULARIA VERRUCIFERA (von Martens). 
“Shell oblong-elliptical, slightly inflated, solid, grayish-green, 
sculptured anteriorly with rows of warts curving upwards, 
ending in an acute angle at the middle of the shell; rounded in 
front; posterior portion elongate, subrostrate, sculptured with 
rather numerous, radiating, compressed folds; ventral margin 
straight; posterior margin strongly oblique above and some- 
what ascending below. Nacre white, reddish-yellow in the 
centre. Cardinal teeth rather heavy, crenate, the anterior one 
of the left valve much the longer, the upper one of the right 
valve slight, small; lateral teeth strong, moderately elongate, 
nearly straight, rugose. 
