WORMS. TESTACEA. ‘^,g. .Cardium. 20S 
IC 
^ Shell antiquated , with about a8 depreffed ribs, ■ with obfole^- 
recurved fcales Csmnmi Cockl 
Pemant Brit. Zool. iv. tab. 50, fig. 41. 
Lifier conch, tab. 333. f. 17O. tab. 334 >y‘ * 7 *’ 
.Lifter Amn. Angl. tab. 54 - 
Gualt. test, tab, F. KmrrVergn. 6 . tab. f. 2, 4. 
Chemn. conch. L.Vign. s[,C. tab. ig.f. ig^. ,11 v t 
Found on all fandy coalls^ in great abundance, lodged a litt.e 
* beneath the fand ; their place is pointed out by a round depref- 
fed fpot: Jbeil generally white, with fometimes a bluciili or 
ycllowifh caft ; the ribs' a little rough near the circuraferer.ee. 
The filh affords a wholefome and nourifhiog food. 
^^‘^idicumi Shell grooved, with about 36 triangular fmooth ribs. 
Chemn. conch, 6. tab. ^g,fig^tg^. , , n ■, 
Inhabits Iceland and Greenland Teas ; rcfenibles tne lau> but tiiC 
grooves are deeper and more numerous, and there is no tranf- 
verfe ftrite except the outer margin: blackifh.ibraetimes banded. 
Shell antiquated, glabrous, thin, moufe -colour, with angt:'- 
lar ferruginous lines ; the margin fmooth, with obfo- 
lete longitudinal ftria:. 
Chemn. con^. 6. tab. ig, fg, iqH* 
Inhabits Greenland and Iceland; 2| inches long, 3j broad: 
fometimes marked with brownilh bands; probably a variety 
of C. edule. 
Shell antiquated, with go remote grooves, the intermediate 
fpaces rugged. 
Barbui’s Shells, tab. 3. fig. IZ. 
Regenf, conch, 1. tab, 1 2, 77> 7®* 
Chemn. conch. 6. tab. 19, fig. I 97 * 
Inhabits European feas, principally the Mediterranean: refembles 
C. edule, but the fltells have an evident ridge on the fore- 
margin, when clofcd, a narrow depi'efl'ure behind the beaks, 
the grooves deeper, and the ribs fewer and more convex : 
colour fometimes feiruginous with livid bands; {ometitnes 
white, the anterior part brown, within blucifh; fometimes 
yvhite with ferruginous yellowilh or bluellh bands. 
Shell fubantiquated, tlte forepart glaucous, the hind-part 
with 20 grooves imbricate upwards: beaks violet. 
Poiret Voyage en Barb, 2. p. 13. 
Idkahni Barbary : 10 lines high, 12 broad, 8 deep. 
. ‘'^^^’tatum. Shell flightly heart-fliaped and pedlinate. 
Murr.fund.teji. tab. 2, fig, 1 8, 
"“fiieum. 
9 l. 
“’‘Cum. 
InliabI: 
