NODULARIA 999 
Unio jourdyi Morir, Jl. de Conch., XXXIV, 1886, pp. 76, 
289, pl. xIII, figs. 5, 5a. 
Nodularia jourdyi SIMPSON, Syn., 1900, p. 816. 
O.rynaia jourdyvi Haas, Con. Cab., Unio, 1910, pl. xvi, figs. 
2 
Var. corrugata (Dautzenburg and H. Fischer). 
“In this variety the tuberculous sculpture of the beaks ex- 
tends down over part of the disk.” (D. & F.) 
Unio jourdyi var. corrugata DAutzENBuURG and H. Fiscuer, 
ji.de Conch,;-LEIIL, 1905). p: 205. 
Var. ponderosa {Dautzenburg and H. Fischer). 
This variety differs from typical U. jourdyi by its much 
thicker shell, its higher and much more inflated anterior re- 
gion and its more prominent beaks.” (D. & F.) 
Type locality, Grand ac, Hanoi. 
Unio jourdyi var. ponderosa DAUTZENBURG and H. FIscHEr, 
jide Conch. LIM, 16055 p:.453. 
Jn the synopsis | placed this species in the pasii group, but 
it is probable that it should go in the group of \. cerulea. 
While its external appearance is something like that of N. 
pazu, the pseudocardinals are much shorter and stronger. It 
seems to stand between the two groups. The shell is more 
inflated behind the middle than N. pazit. 
Haas has recently, (Nachr. Deutsch. Mal. Ges., 1913, p. 34), 
made this species the type of a new genus, O.rynaia. 
NODULARIA INGALLSIANA (Lea). 
Shell elongated, inflated, scarcely subsolid, inequilateral, in- 
flated: beaks full and high; anterior end rounded; base nearly 
straight in front, full behind the middle, slopingly truncate 
behind the swelling to the posterior point, which is situated 
above the median line; posterior ridge near the dorsal line, 
angled above, straight ; surface with delicate, irregular growth 
lines ; epidermis dull, silky, olive with lighter bands, with faint 
