ASTARTIDA. 299 
Lureria, Deshayes, 1860. 
Disir.—2 sp. Fossil. Paris Basin. LZ. Parisiensis, Desh. 
(exxi, 24). 
Shell small, orbicular, globose, equivalve ; 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; ligament external. 
Micromeris, Conrad, 1866. 
Syn.—Pteromeris, Conr., 1865. 
Distr.—Eocene; Alabama. JM. minutissima, Lea (exxi, 25). 
Shell trigonal, with produced, somewhat attenuated, rather 
straight beaks, ventrally rounded, slightly inflated, striated or 
suleated on the surface; the hinge appears to have two small 
cardinal teeth in the left valve and one in the right, and one long 
posterior lateral tooth in each. 
Woopta, Deshayes, 1860. 
Etym.—Dedieated to Searles V. Wood, a distinguished pale- 
ontologist of England. Syn.—Digitaria, Wood. / 354, Crag MeU.il, 197, 
Distr.—1 recent sp. Mediterranean; also fossil in the Tertiary. 
W. marginalis, Desh. (exxi, 26). 
Shell small, rounded, equivalve, equilateral; valves closed, 
smooth, or ornamented with oblique, curved strie#; hinge thick; 
right valve with a single, large, median, triangular tooth, de- 
pressed or channeled in the middle; left valve with two narrow, 
unequal, diverging teeth; lateral tooth wanting or rudimentary ; 
ligament internal, small; muscular scars small, equal, oval or 
ovate; pallial line simple. 
Exatai,, Issel. 
Distr.—E. Arconatii, Issel (exxi, 27, 28). Red Sea. 
Shell ovately elongated, much compressed, inequilateral, ante- 
riorly much shorter; concentrically striated ; umbones very small, 
curved in; lunule small, deep; hinge with a single, large, elon- 
gated cardinal tooth in each valve. 
In form it resembles Goodallia, but also exhibits considerable 
relation to some of the elongated forms of Loripes. 
Evroxa, Conrad, 1864. 
Distr.—E. latisuleata, Conr. (cxxi, 16,17). Miocene; U.S. 
Shell like Astarte, somewhat produced posteriorly, hinge 
apparently with three cardinal teeth in the left valve, the two 
teeth on the sides being much smaller than the median one, and 
two teeth in the right valve. 
