1927] Pilsbry-Bequaert, The Aquatic Mollusks of the Belgian Congo 457 
Congeria ornata (Morelet) 
Text Figure 94a, b, c 
Dreissensia ornata MorELET, 1885, Journ. de Conchyl., X XXIII, p. 32, Pl. 1; 
figs. 10 and 10a (type locality: Mayumba River, French Congo). C. R. Barrcrr, 
19138, Ann. Soc. Zool. Malacol. Belgique, XLVII, (1912), p. 110. 
Dreissensia bananaensis Preston, 1909, Ann. Mag. Nat. Hist., (8) IV, p. 88, Pl 
TV, figs. : 
Creek of Banana (P. Hesse Coll.); also type locality of D. bananaensis Preston. 
Congo; specimens in the Academy of Natural Sciences, Philadel- 
phia, received from Morelet and probably part of the original lot. 
Fig. 94. a-c, Congeria ornata (Morelet). At b, an oblique view into the cavity 
of the beak.” 
m, myophore. 
A small, triangular species, rather broad, but variable in width, dull, 
light brown with many indistinct dark rays. The surface is minutely 
and closely laminiferous. Interior dull blue, the very large posterior 
adductor scar purplish black, or the cavity may be tinted and pencilled 
with blackish brown, the muscle scar and outside of it blue-white. 
Length, 15.3 mm.; width, 9.8 mm.; diameter, 7.0 mm. 
i 16.2 SA id 8.0 
