178 



WORMS. TESTACEA. s 6. Mya. 



Inhabits Nicobar IJlands : valves on one fide convex, broad and 

 rounded at tne margin, on the otner more angular, narrow, 

 flat and gaping, 



Australis* Shell ovate-compreffed, clofed : hinge with 2 lateral teeth. 

 Chemn. conch* 6. tab, 3. fia 19, 20. 

 Inhabits New Zealand: dirty ochraceous; 



Gaditana. Shell rounded, flattifh, tranfverfely ftriate ; ochraceous, 

 within white ^ 

 Inhabits fhores of Cadez. Chemn* conch. 6. tab* $.fig.^2Z, £/ *' 



Qorrugata. Shell rhombic, green ; the protuberant parts wrinkled. 



Mull. Befch ftatwfi. 4. p. 58. tab. 3. jig. 7, 8. 



Schrcet. Flufconch. tab. 9. fig. 3. 



Chemn conch 6. tab. 3. fig. 22. a, b. 



Inhabits ^rivers of Coromandel t and when the outer fkin or epi- 

 dermis is removed is clay colour; thin, pellucid, and marked 

 with wrinkled Unas from each part of the hinge; within 

 painted with fine radiate ilriae : 1 1 — 16 lines long. 



Rugosa. Shell oval, wrinkled, outwardly greenifli, within margari- 

 taceous: primary tooth of the hinge crenulate, with a 

 longitudinal lateral one, double in the other valve. 



Chemn. conch. 10. p. 364.. tab. 170. fig. 1649. 



Inhabits rivers on the coaft of Qoromandel. 



Nodosa* Shell oval, thin, greenifli; the protuberant parts knotty. 

 Inhabits——. Chemn. coach. 10. tab. 170. f. 1650, 



Norixegka. Shell oval, longitudinally and thickly ftriate : one end 

 rounded, the other truncate: protuberant parts dej 

 corticated. 

 Inhabits — . Chemn. conch. 10. tab. i70.fi. 1647, 1648. 



Spuria. Shell rhombic, green ; the protuberant part glabrous. 

 Schrxt. Einl. conch. 2, 617. tab. 7, fitg. f. 

 Inhabits rivers of Tranquebar ; refembles M. corrugata, buJ 



nearly twice as large. ' 1 



Glycemerisp Shell gaping at both ends, very thick, lamelbus, oblong- 

 oval, with tranfverfe wrinkled {trice : primary tooth of 

 the hinge very thick. 

 Lifter conch. tab.^X^, fig y 258. 



Klein 



