1926] Pilsbry-Bequaert, The Aquatic Mollusks of the Belgian Congo 369 
rivers of Liberia (between Cape Palmas and Sierra Leone). We have 
before us specimens labelled Cape Palmas and Old Calabar (collector not 
recorded); and it is evidently what von Martens (1877) recorded from 
Mungo Creek, in the delta of the Cameroon River (Coll. Buchholz), since 
he noted that they agree with Chemnitz’s type figures of Venus reclusa.' 
Most of the figures of “G. radiata” published by Bernardi, Sowerby, 
and some others appear to represent forms of E. p. hermaphrodita. 
_ Germain (1916) reported G. radiata from the French Congo (Gaboon) 
coast in the Ompolunyé, one of the arms of the Ogowe (L. Fea Coll.). 
This place must be very near the type locality of EH. bernardii.. The 
outline figure given would serve equally well for a form of that species. 
There are two records of G. radiata Lamarck from the Congo. But 
that of Sowerby, 1821, was certainly based upon specimens of EF. con- 
gica (O. Beettger), as the good figures demonstrate. A. Nobre’s “ Fleuve 
Zaire’ record of G. radzata collected by Newton? we cannot control; 
but that species did not turn up in the collections made in the same 
region by Hesse, Dupont, Lang, and Bequaert. We conclude that what 
Newton got was probably H. congica, the common species of tidal 
waters of the Congo, and one which Nobre did not mention. 
IPHIGENIA Schumacher 
Iphigenia ScHuMACHER, 1817, ‘Essai Nouv. Syst. Test.,’ p. 155. Monotype: 
Donaz lexvigata ‘‘Chemnitz’’ Gmelin. 
?2Donacina Férussac, 1821, ‘Tabl. Systém. An. Moll.,’ pt. 1, p. xliii; listed as 
equivalent to Capsa Lamarck, Donax of Linnseus and py oe no species men- 
tioned. 
Procos GisTEL, 1848, ‘Naturgesch. Thierr. f. Peter Schulen,’ p. 172. Substitute 
for Capsa Lamarck and “T’. levigata”’ given as the only species. 
Fischeria Bernarpi, 1860, ‘Monogr. Galatea et Fischeria,’ p. 45. Monotype: F. 
delessertit Bernardi. Not Fischeria Robineau-Desvoidy, 1830. 
Egeria section Profischeria Datu, 1903, Proc. Biol. Soc. Washington, XVI, p. 7. 
Substitute for Fischeria Bernardi. 
Shell thin, trigonal to elliptical with median peek covered with a thin yellowish 
to olive-brown periostracum. Interior violaceous, varied with white, or pure white. 
Right valve with a triangular, bifid median cardinal tooth and a much reduced anterior 
one, and low, rather long, narrow laterals forward and behind. Left valve with sub- 
equal anterior and posterior cardinals and no laterals or sockets. Nymphs well 
developed. Ligament short, external; a narrow resilium below it. Pallal sinus ample, 
extending past the middle of the shell’s length. 
Sam Cao 7A ek ine haw A a Raine a ES es naa Ee ee a ET a 
Chemnitz gives an che sea istory of this name. 
21886, O Instituto, Coimbra, XXXIV, p. 403 (not seen by us); 1909, Bull. Soc. Portugaise Sci. 
Nat., III, Suppl. 2, p. 108. 
