NODUI,ARIA 1033 
is thin, of an olive-green, a little yellowish towards the beaks 
and anterior margin, with a few, narrow, emerald-green rays. 
Ines of growth not strong, irregular, slightly lamellose to- 
wards the basal margin. Nacre rose-tinted, slightly iridescent. 
Length 50, height, at 15 mm. from the beaks, 25.5, under 
the beaks 23, diam 17.5 mm.” (Germain). 
Type locality, The Congo. 
Zairia elegans ROCHEBRUNE, Bull. Soc. Mal. Fr., III, 1886, p. 
I12.— SIMPSON, Syn., 1900, p. 862. 
Unio (Nodularia) roubaudi GERMAIN, Bull. Mus. Hist. Nat., 
XX, 1907, p. 420, fig. 28. 
The new name proposed by Germain, (1. c.), is unnecessary 
in Nodularia, 
The original description not being accessible at the present 
time, I have copied that given by Germain. That author fur- 
ther remarks that the species resembles the U. landanensis 
Schepman very closely, that being a shell of practically the 
same character, but of a more elongated form with the basal 
margin more oblique, but it is probable that they are the same 
species. 
NopDULARIA GEAYI Germain. 
“Shell elongate-oval, slightly subcuneiform, somewhat in- 
flated, the greatest width posteriorly ; valves gaping anteriorly ; 
anterior end rounded, sloping towards the base; posterior re- 
gion more than two and one-half times as long as the anterior, 
terminating in a slight, post-basal point ; dorsal edge blunt ; dor- 
sal margin subconvex, ascending obliquely to the postero-dor- 
sal angle, which is not strong and from which it merges into 
the convexly descending posterior margin; ventral margin 
convex, slightly subsinuous in the middle; beaks small, not 
prominent, much eroded; anterior ligament thin, scarcely pro- 
jecting, 7 mm. long; posterior ligament not very strong, of a 
rather dull reddish-brown, 12 mm. long. Hinge weak; in the 
right valve, two, short, rather low, subequal cardinals and one 
long, straight, not prominent, thin and sharp lateral; in the 
left valve a single, weak, low, subtriangular cardinal and two, 
thin, rather long, nearly straight laterals, the lower slightly the 
