178 WORMS. TESTACEA. 56. Mya, 
Inhabits Nicovar Iflands :: valves on one fide convex, broad and 
roundec at the margin, on the other more angular, narrow, 
flat and gaping. 
Australis. Shell ovate-compreffed, clofed: hinge with 2 lateral teeth. 
Chemn. conch, 6. tad 3. fig 19,20. 
Inhabits New Zealand: dirty ochraceous, 
Gaditana, Shell rounded, fiattifh, tranfverfely ftriate; ochraceous, 
within white. 
Inhabits fhores of Cadex. Chemn. conch. 6. tab. 5. fig. 22. 
Corrugata. Shell rhombic, green; the protuberant parts wrinkled. 
Mull. Befch. Natu f. 4. pv 58. tab. 3. fig. 7, 8. 
Schrat. Flufconch. tab. 9. fig. 3+ 
Chemn conch. 6. tab. 3. fig. 22. a, b. 
Inhabits rivers of Coromande/, and whien the outer fkin or epi- 
dermis is removed is clay colour; thin, peliucid, and marked 
with wrinkled ftri; from each part of the hinge; within 
painted with fine radiate ftrie ; 11—16 lines long. 
Rugosa. —— Shell oval, wrinkled, outwardly greenifh, within margari- 
taceous: primary tooth of the hinge crenulate, with a 
longitudinal lateral one, double in the other valve, 
Chemn. conch. Yo. f. 364. tad. 170. fig. 1649. 
Inhabits rivers on the coaít of Coremandel. 
Nodosas Shell oval, thin, greenifh; the protuberant parts knotty. 
Inhabits Chema. conch. 10. tab. 170. f. 1650. 
Nerawegica, Shell oval, longitudinally and thickly ftriate: one end 
rounded, the other truncate: protuberant parts de- 
corticated. 
Inhabits «. Chemn. conch. 10. tab. 170. f. 1647, 1648. 
Spuria. Shell rhombic, green; the protuberant part glabrous. 
Schrat. Einl. conch. 2, 617. tab, 7, fig. 5. 
Inhabits rivers.of Trazquebar; reíembles M. corrugata, but is 
nearly twice as large. 
Glycemerii, Shell gaping at both ends, very thick, lamellous, oblong- 
oval, with tranfverfe wrinkled ftriz : primary tooth of 
the hinge very thick. 
Lifter conch, tab. 414. fig, 258. 
Klein 
