360 | Bulletin American Museum of Natural History ‘Vol. LIT 
Megadesma Bownicu, 1822, ‘Elem. of Conch.,’ pt. 2, p. 8, fig. 21. Substitute 
for Galathea Lamarck. . 
Galathea G. B. SowERBY, 1839, ‘Conchol. Man..,’ Ist Ed., p. 88, as a synonym of 
Potamophila. Misspelling of Galathea Lamarck. 
Galateola ‘Fleming’? HeRRMANNSEN, 1847, ‘Ind. Gen. Malac.,’ I, p. 458, as a 
synonym of Galatea. In Fleming, 1828, ‘Hist. British Anim.,’ p. 409, Galateola is 
used as a nomen nudum, without mention of species, so that the name properly dates 
from Herrmanns<n. 
Galateia F. pe Brirro CaPELxo, 1878, Mem. Ac. Sci. Lisboa, Cl. Sci. Math. Phys. 
Nat., N.S., V, 2, ‘Description Esp. Galateia,’ p.2. Emendation of Galathea. 
The shell is trigonal or oblong, solid, covered with a strong olivaceous, brownish 
or yellowish periostracum, under which it is white, violet or pink end sometimes 
rayed. Hinge-plate wide. Two.or 3 diverging cardinal teeth, often irregularly sul- 
cate radially, and with low, short anterior and posterior lateral teeth in the right, 
sockets in the left valve; but these teeth often become almost obsolete in adult shells. 
Nymphs strongly developed. Ligament short and prominent. Pallial sinus small, 
not reaching to the middle of the shell’s length. 
These large, handsome clams are usually characterized by an exces- 
sive development of the shell in thickness. The siphons and the pallial 
sinus are far shorter than in Iphigenia, which in teeth and other 
respects is a less evolved stock than Hgeria. 
West Africa, from Liberia to Angola, in estuaries. 
The localities of nine of the seventeen species are unknown. No 
doubt the number of species and varieties from the Loanda district of 
Angola will be materially reduced when pee quantities of une shells 
are studied. 
Egeria agwmaru (Brito Capello)=Galateia aguwarii Brito CapELLo, 1878, 
Mem. Ac. Sci. Lisboa, Cl. : ci. Math. Phys. Nat., N.S., V, 2, ‘Description Esp. 
Galateia,’ p. 11. Quanza River, Angola. 
Egeria bengoensis (Dunker)=Galatea bengoensis DuNKER, 1849, Zeitschr. f. 
Malakoz., V, (1848), p. 183; 1858, ‘Ind. Mollusc. Guin. Infer.,’ p. 51, Pl. rx, figs. 
28-30. Brrnarpi, 1860, ‘Monogr. Galatea,’ p. 25, Pl. v1, figs. £ and 6 : nd Pl. 1x, 
fig. 4. Sowrrsy, 1868, ‘Conchol. Iconica,’ XVI, Galatea, Pl. v, fig. 11. Galateia 
bengoensis Briro CAaPELLO, 1878, Mem. Ac. Sci. Lisboa, Cl. Sci. Math. Phys. Nat., 
N.S., V,.2;, ‘Description Bey Galateia,’ p. 16 (which var. versicolor, multiradiata, ia 
Held all from the Bengo River). asda. Bengo River, near honndac 
Egeria bengoensis bocagit (Brito Capello) = Galateia bocagit Brrro CaPrEui 0, 1878, 
Mem. Ac. Sc. Lisboa, Cl. Sci. Math. Phys. Nat., N.S., V, 2, ‘Description Esp. 
Galateia,’ p. 9, Pl. 1, figs. 8 and Pl. 11, figs. 2—4. Gianga Rive Sate 
ne hagonisis leta ennai =Galatea lxta Puttipri, 1849, Zeitsch. f. Mala- 
koz., V, (1848), p. 190 (type locality unknown); 1851, ‘Abbild. Beschr. Conchyl.,’ 
ll a 123, Pl. 1, fig. 2. Bernarpi, 1860, ‘Monogr. Galatea,’ p. 27, Pl. 1, figs. 3, 4, 7, 
and 8 and Pl, vill, fig. 7; with var. ‘petauta “Morelet,” p. 29, Pl.1, figs. 7-8, edited 
to H.and A. iain (1856, ‘Gen. Recent Moll.,’ IT, p. 408) where it isa nomen udum. 
SOWERBY, 1868, ‘Conchol. Iconica,’ XVI, Galatea, Pl. v1, figs. 16d, e, f. Galateia leta 
Brito CaPELio, 1878, Mem. Ac. Sci. Lisboa, Cl. Sci. Math. Phys. Nat., Nis; V, 2, 
