986 NODULARIA 
NoODULARIA MOSSAMBICENSIS (von Martens). 
Shell subrhomboid, subsolid, inequilateral, somewhat inflat- 
ed; beaks moderately full; anterior end rounded; base line 
curved, not very full behind the middle; dorsal outline lightly 
curved; dorsal slope obliquely subtruncated; posterior ridge 
low, rounded, ending in a rounded point below the median line ; 
surface strongly concentrically striate; epidermis olivaceous ; 
pseudocardinals subcompressed, triangular, sulcate; macre 
pearly. 
Length 41, height 24, diam. 17 mm. 
Sennaar, northeast Africa; Mosambique, Zambezi River. 
Unio mossambicensis von Marrens (Peter’s manuscript), 
Mal. BL, Vi, 1860, p. 218) pl. wi.tigs. 3-55 Besch. Deuts. 
Ost. Af:, 1807,-p. 225, pla vu, he. 2: 
Nodularia mossambicensis SIMPSON, Syn., 1900, p. 813. 
Cafferia mossambicensis ConNoLLy, Ann. S. A. Mus., XI, 
1Q12, "p. 273. 
Unio sennariensis var. von Martens, Mal. BL, XXI, 1873, 
Pp. 43. 
Unio parreysi (v. d. Busch.) var. schweinfurtlt voN MARTENS, 
Noy. Conch., 1V, 1876, p. 140, pl. cxxxm, figs. 4-5: 
I cannot be positive as to the relationship of this species, 
which I have never seen. The outline is subrhomboid, and 
in the specimen figured a very little cut away at the antertor 
base. 
NoDULARIA INORNATA (Lea). 
Shell somewhat elongated, slightly obovate, thin, convex, 
inequilateral; beaks full and high; posterior ridge rounded, 
ending in a blunt point about on the median line; dorsal line 
lightly curved; anterior end rounded; base line rounded or 
nearly straight, fuli behind the middle; dorsal slope somewhat 
obliquely truncated; surface nearly smooth; epidermis dirty 
bluish-green or yellowish-green, dull, having two or more 
faint, posterior rays; teeth greatly compressed, attenuated ; 
muscle scars shallow, faint; nacre bluish-silvery, iridescent. 
Length 45, height 23, diam. 16 mm. 
Siam ; Cambodia. 
