1026 NODULARIA 
Var. minor Germain. 
“Shell thin, light, with a brilliant chestnut epidermis orna- 
mented with narrow, emerald green rays, more numerous pos- 
teriorly. ‘The beaks sometimes have strong tubercles; nacre 
orange, very iridescent. 
Tjength 26-32, height 20-23, diam. 11-15 mm.” (Germain). 
Type locality, Le Kanem, eastern Tchad. 
Unio (Nodularia) essoensis var. minor GERMAIN, Bull. Mus. 
Hist;, INat:, 1906, p172. 
NoDULARIA DECAMPSIANA (Wattebled). 
Shell rather short, irregularly elliptical, convex, rather thin, 
somewhat inequilateral ; beaks but slightly elevated ; hinge line 
curved; anterior end evenly rounded; base line curved, a little 
fuller behind the middle; posterior ridge moderately elevated, 
inclined to be double, ending a little below the median line; 
dorsat slope obliquely subtruncate; surface sculptured with 
rather fine, concentric ridges; epidermis brownish-black ; teeth 
compressed ; pseudocardinals sublamellar; muscle scars well 
marked; nacre purplish, rather brilliant. 
Length 4o, height 26, diam. 16 mm. 
Western Soudan. 
Unio decampsianus WaAtTTEBLED, J. de Conch., XXXII, 1884, 
pet 32) plcvin; fies sr. 
Nodularia decampsiana SIMPSON, Syn., 1900, p. 822. 
Unio campsianus Parren, Conch. Sam., III, 1890, p. 147. 
This species probably belongs in this group. It appears to 
be a little solider than N. @gvptiaca, is more compressed, has 
apparently decided concentric sculpture and purplish nacre. 
NopULARIA BELLAMYI (Jousseaume). 
Shell rather small, nearly regularly obovate, being slightly 
narrowed in front, inequilateral, thin and fragile, inflated; 
beaks full and high, sculptured with fine, broken, granular 
wrinkles, this sculpture extending more or less over the shell, 
especially on the ends of it; epidermis yellowish-gray with a 
