NODULARIA 1041 
lar, strong, plicate lines of growth and in the umbonal region 
strong, zigzag ridges, tuberculate and very irregular. Nacre 
Prussian blue, very iridescent, sometimes salmon-tinted to- 
wards the ventral margin. 
Length 40, height 26, diam. 21 mm.” (Germain). 
Type locality, Swamps of Kollangui, French Guinea. 
Unio (Nodularia) kehleri GermMatn, Bull. Mus. Hist. Nat., 
1909, p. 541, pl. vit, figs. 43, 44, 47. 
“This very beautiful species cannot be compared with any 
African Unio now known. It resembles a little, by its globose 
form and zigzag sculpture the Unios of Lake Victoria-Nyanza, 
such as Unio hypsiprimus Martens and Unio hautteceuri 
Bourguignat. Its sculpture, moreover, is very similar to that 
of Spatha vignoni Bernardi.” 
NopuLARIA GAILLARDI Germain. 
“Shell quite small, very elongate-elliptic, much compressed ; 
thin, light, slightly gaping posteriorly ; dorsal margin subcon- 
vex, slightly oblique; ventral margin regularly rounded, almost 
parallel to the dorsal margin; antero-dorsal angle well marked ; 
postero-dorsal angle slight; anterior margin short, rounded, 
cut away towards the base; posterior region much developed, 
at least three times as long as the anterior, posterior end 
elongated, submedian, somewhat pointed; beaks very small, 
not prominent; dorsal edge very blunt; ligament thin, 15 
mm. long; hinge not very strong; in the right valve, two short 
cardinals, rather high, crenate, the lower notably higher and 
stronger and a single, long, subconvex, very thin lateral; in 
the left valve, one very feeble, low cardinal and two subequal, 
week, thin laterals; muscular impressions faint. 
Shell thin, rather fragile, light; epidermis a clear chestnut, 
slightly tinged with gray; lines of growth fine and irregular; 
nacre violet, very iridescent. 
Length 42, height 20.5 at 9.5 from the beaks, diam. 10 
mm.” (Germain). 
Type locality, Senegal. 
Unio (Nodularia) gaillardi Germain, Bull. Mus. Hist. Nat., 
1909, p. 542, pl. viii, figs. 41, 42. 
