NODUI,ARIA 1039 
longer, less high, thinner ; lateral tooth long, thin, elevated ; in 
the left valve, one, subtriangular, rather elevated cardinal tooth 
and two very long, thin, quite elevated laterals, the lower 
higher than the upper: anterior muscle impressions moderate, 
posterior very superficial ; ligament very short, brilliant chest- 
nut-color. 
pidermis deep chestnut-color, passing into blackish-brown 
anteriorly ; lines of growth fine, quite regular, very crowded, 
finer and more irregular posteriorly, and ornamented, besides, 
with more or less prominent folds radiating from the beaks. 
These folds are only found on the umbonal region, where 
they surround, so to speak, the beaks ; they are more developed 
posteriorly and in the centre and anteriorly become projecting 
granules. This sculpture of the shell is, in every way, compar- 
able with that of the Unios of the Victoria-Nyanza. Nacre 
very iridescent, quite deep Prussian blue. 
Length 31, height at 10.5 mm. from the beaks 19, diam. 10 
mm.” (Germain). 
Type locality, Le Mamoun, Country of Senoussi. 
Unio (Nodularia) chivoti GERMAIN, Bull. Mus. Hist. Nat., 
1007, p06.) Att. Cent. Franz, 1907, p. 542, pl: v, fig. 23: 
NopuLARIA BANGORANENSIS Germain. 
“Shell small, elongate-oval, rather convex; gaping consid- 
erably in front, very slightly posteriorly ; dorsal margin regu- 
larly convex; ventral margin very convex; anterior margin 
rounded, slightly curved in towards the base; posterior end 
not quite one and one-half times as long as the anterior, ter- 
minating in a small point; beaks slightly obtuse, a little com- 
pressed; dorsal edge very blunt; hinge having in the right 
valve, two, not very long, cardinal teeth, the lower subtrian- 
gular, much elevated, much more so than the upper, which is 
very slight and a long, rather low lateral; in the left valve, 
one rather high cardina! with two projecting points, the first, 
very sharp, almost under the beaks, the other longer and blunt- 
er near the antero-dorsal angle, and two very long laterals; 
anterior muscular impressions deep, posterior very superfi- 
