CONCHIFERA. 
Crags of England, in that of Anvers, and in the Pleistocene 
deposits of Palermo. 
Fossil, 8 species. Hocene, Miocene, Pliocene. France, 
England, Germany. W. lameliosa, Sandb., is inequilateral. 
LutTETIA, Deshayes, 1860. 
Example, Li. Parisiensis, Deshayes. 
Shell small, orbicular, globose, equivalye; valves closed ; 
border simple and entire; hinge narrow; cardinal teeth three in 
each valve, two diverging; the third large and obliquely placed 
between the others; muscular scars small, oval, submarginal, 
equal; pallial line simple; hgament external. 
Fossil, 2 species. Hocene, Paris. 
GOooDALLIA, Deshayes, 1860. 
Example, Erycina miliaris, Defrance. 
Shell small, trigonal, equivalve, inequilateral; valves closed ; 
cardinal teeth in the right valve two, diverging, separated by a 
triangular socket; in the left valve, one triangular, sometimes 
bifid; lateral wanting, or rudimentary; ligament external, very 
short; pallial line simple. 
Fossil, 8 species. Hocene. Paris. 
GooDALLIOPSIS, Raincourt and Munier, 1863. 
Type, G. Orbignyi, Raine. and Mun. Hocene. Fercourt. 
Shell oval, flattened, equivalve, inequilateral, smooth, slightly 
dilated in front, and compressed behind; valves closed; hinge 
with two cardinal teeth, separated by a triangular socket, in 
each yalye; lateral teeth distinct and elongated, one in each 
valye. Other characters those of Goodallia. 
Famity XIV.—VENERIDA.* 
PsaATHURA, Deshayes, 1860 (see p. 456). 
Etymology, va8vpic, friable. 
Type, Erycina fragilis, Lamk. Eocene. Paris basin. 
Shell oval, inequilateral, thin, transparent, fragile; hinge 
teeth, in the right valve, two equal and deeply bifid; left valve, 
two unequal, entire; ligament external; anterior adductor scar 
narrow, clavyiform; posterior subquadrangular; pallial simple, 
thus differing from Clementia, to which it is related by the hinge 
characters. 
* See p. 472. 
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