tob WORMS. TESTACEA. 59. Cardium. . 



Inhabits the Mediterranean: white, with diftant ftrias roiigh 

 upwards; the cavity under the beaks yellow; behind the 

 beaks an ovate gape, margins prominent, 



rirgineum. Shell triangular-rounded, equilateral, with tranfverfe mem- 

 branaceo- recurved wrinkles: hinges blue. 

 Inhabits the Mediterranean, and appro-xhes to the Genus Maclra 

 in the lateral teeth of the hinge: elegantly banded, covered 

 with a glaucous cuticle, and white within. 

 2. Chemn. conch. 6, tab, i8,y. 1 8 1 * 

 Grotto-v. Zooph. tab. 18, f. 5. 



Inhabits India and America: fhell thin, brittle, longitudinally 

 flriate, purple on the anterior margin and red at the beaks. 



Ttilaterum Shell triangular, gibbous, ftriate* 



Inhabits tnc La/pi an iea : a very indi flinch fpecies. 



Auricula. Shell heart- fhaped, fubrhombic, with 24 ribs each fide, 

 the grooves very finely crenulate : beaks diftant. 

 Inhabits Arabia and Egypt. Rc^enf. conch. 2. tab. 9. 

 Shell white, pellucid, z\ inches long, i-| broad: margin of the 

 back revolute, toothed. 



Tftfle, Shell oval, fmooth, the margins each fide the beaks frriate. 



Inhabits . Shell imooth, cinereous, radiate with white: 



beaks reflected. 



Monjlrofum. Shell gibbous, one fide impreued and ochraceous, the other 

 convex, hcart-fhaped and whitifii fpotted with yellow; 

 the valves with toothed ridges. 



Chemn. conch. 6. lab. 14, fig. 149, I 50. 



Inhabits Nicobar Ijlands ,* a very rare fpecies. 



Lima. Shell gibbous with prickly ribs, the anterior ones with re- 



curved membranaceous tubercles crenate at the fides, 

 the intermediate grooves granulate. 

 Chemn. conch. 6. tab. 15, fig. 153, 154* 



2. Shrcet. Einl. in conch. 2. fab t 7, fig. 13, a, b.* 



Inhabits Nicobar Ijlands: ochraceous, the anterior margin flefh- 

 colour, beaks reddifh : 2) ribs more rounded, not prickly 

 but granulate. 



&invcns. Shell rounded, ventricofe, white, with deep teeth on the 

 margin, the anterior ones rofy. 

 Lifter j tab. 330. AdanfSeneg. tab. 18, fig. 1. 



Knorf 



