A927 3 2 Pilsbry-Bequaert, The Aquatic Mollusks of the Belgian Congo oil 
Iphigema levigata (Gmelin). See p. 374. 
Iphigena lenzi (Dautzenberg). See p. 374. 
Iphigenia messageri (Preston) = Fischeria messagert Preston, 1909, Ann. Mag. 
Nat. Hist., (8) III, p. 186, Pl. vu, fig. 17. Senegal River. 
Iphigenia rostrata Roemer. See p. 372. 
Iphigenia truncata (EK. v. Martens) = Fischeria truncata E. v. Marrens, 1877, 
Monatsber. Ak. Wiss. Berlin, (1876), p. 271, Pl. v, figs. 6-8. Mungo Creek in the 
‘delta of the Cameroon River. 
Iphigenca tumida (KE. v. Martens) = Fischeria tumida E. v. Martens, 1877, op. cit., 
p. 271, Pl. v, figs. 9-11. Loango Coast. 
Iphigenia psammobialis DresHayes, 1854, Proc. Zool. Soe. Hm: p. 346, was 
described from an unknown locality. 
Iphigenia curta (Dunker) 
Plate XXVIII, Figures 5—-6b 
Fischeria curta DUNKER, 1867, Malakoz. Blatter, xy p. 207, Pl. 11, figs. 4-6 
(type locality: West Africa). | 
Fischeria globosa Preston, 1909, Ann. Mag. Nat. Hist., (8) IV, p. 91, PL iv; 
fig. 10 (type locality: Congo delta). 
Banana, on the sandbanks near the entrance of the creek which 
leads to Moanda. San Antonio, at low tide on sandbanks at Point 
Padrao, buried from 1 to 2% inches deep. Several hundreds of speci- 
mens (Lang and Chapin Coll.). 
The shell is subtriangular, strongly inflated, with very full, and 
prominent beaks; covered with a thin, dull periostracum, chamois to 
isabella color in young, light brownish olive in old individuals; more> 
or less extensively lacking at the beaks. The contour varies from even 
shorter than Dunker’s type to much longer, as may be seen in the figures 
and measurements. There is a small elliptical lunule about as long as the 
short ligament. The interior is violet, more or less clouded with a 
lighter tint or almost white, and often showing light rays on the posterior 
half by transmitted light. The middle cardinal tooth of the right valve 
is distinctly bifid, and the low laterals are narrower than in I. delesserti. 
In the left valve the anterior and posterior cardinals are emarginate 
and there are no laterals or sockets. The pallial sinus is ample and 
-extends about 65 per cent of the entire length. 
Banana specimens 
Length, 26.3 mm.; height, 21.5 mm.; diameter, 17.6 mm 
i ea OQ Os 15.0 
ee Be oa 8 ff 14.0 
OS ae cee iY s 22.0 
te ae 1s e 12.7 
