212 WORMS. TESTACEA. 60. Maclra. 



Shell much produced on one fide, and gaping at both ends : 

 refembles a Mya : dirty white or yellowifh tinged with orange 

 and irregularly clouded with brown : hinge with a fmali and 

 large triangular cavity in one valve, and a fimilar cavity with 

 an elevated triangular tooth in the other. 



Cvgnus. Shell fnowy thick 3-fided, very finely ftriate tranfverfely; 

 the Fore-part flattifli and (lightly wrinkled : behind the 

 beaks a broad heart-fhaped thinly ftriate impieilion. J 



Chemn. cone. 6. tab, 21, fig. 207. 



Inhabits Tranquebar : an inch long and rather more broad. 



Maculata, Shell obtufely triangular fmooth thin, with pellucid chefnut 

 (pots, within white and very finely ftriate : behind the 

 beaks a heait-fhaped impieilion.. 



Chemn. cone. 6. tab. 21. fig., 208. 



Inhabits India ; about 1 \ inch long and rather broader. 



Yurgida. Shell inflated, faintly ftriate, pchraceous and white within; 



beaks diftant purplilh : hinge with a fupernumetary 



triangular double tooth. 

 Chemn. cone. 6. tab t 2\.fig. 210, 21.1. 

 Inhabits Tranquebar : 2 | inches long, 3 \ broad ; thin fubpcl- 



lucid, finely ftriate and wrinkled before and behind. 



Violated. Shell thin, obfpletely radiate, finely ftriate tranfverfely: 

 margins each fide the beaks whitifh : hinge with a 

 fupernumerary double triangular tooth. 

 Chemn cone. 6. tab. 22. fig. 213, 214* 

 Knorr Vergn. 6. tab. $.fig* 2? 



Inhabits Tr an qui 'bar: about 2 inches long and 3 broad. 

 Shell thin brittle gaping here and there, anterior margin oblong 

 elevated wrinkled, 



Cuneata. Shell wedge-ftiaped blue finely ftriate tranfverfely, the mar- 

 gin crenulate within. . '*.'' > 

 Chemn* cone. 6. tab. it. fig. m-J. \,\i ** ^ f 



Inhabits refembles the hit, but is only an inch long and 



hardly as much broad: fomctirnes white, 



Glauca. Shell ovate, dirty white with glactius rays, very finely ftri- 

 ate tranfverfely, the anterior part wrinkled. 

 Born Muf. Cds. Find. test. tab. 3.- fig. 11, 12. 

 Chemn. cone, 6. tab, 23. fig. 232, 233. 



Inhabits the Mediterranean : 2 £ inches long, 3 \ broad : beak 

 turned backwards, with a narrow gape between them. 



Ptllucifa* 



