WORMS. TESTACEA. 59. Cardium. 199 
Polygonae Shell white tranfverfely ftriate, orbicular, angular on the 
fore-part: hinge without lateral teeth, the primary one 
projecting doubled, in one valve 2. 
Inhabits India. — Chema. conc. 10. tab. 170. fig. 1651—165 3. 
59. CARDIUM. Animal a Tethys: fhell 
bivalve, nearly equilateral, equivalve, ge- 
nerally convex, longitudinally ribbed 
ftriate or grooved, witha toothed margin: 
hinge with 2 teeth near the beak, and a 
larger remote lateral one each fide, each 
locking into the oppofite. Cockle. 
Costatum, Shell gibbous equivalve, with elevate carinate concave 
membranaceous ribs. 
Barbut’s Shells. tab. 3. fig. 7. Major. 12fl, tab. 10. 
Argenv. Conch, tab. 26. A. Gualt. teh. tab. 72. D. 
Adanfon Seneg. tab. 18. fig. 2. 
Lift Conch. tab. 327- Rumpf. Muf. tab. 48. fig. 6° 
Column. purp. 26. tab. 27. Knorr. Vergn. 1. tab, 28. fig. 22. 
Chemn. conc. 6. tab. 15. fig. 161. 
Inhabits the African Ocean: 3 inches long, 3 1 broad, and above 
3 high: whitifh with broad brown grooves. 
Cardiffa, Shell heart-fhaped, the valves compreffed and carinate with 
teeth: beaks approximate. 
Barbut. tab. 3. fig. 8. Gualt. tef. tab. 84. fig. B, C, D. 
Lifter Conch. tab. 318. 319. Knorr. Vergn. 1° tab. 28. fg. 2. 
Rumpf. Muf. tab: 42. E. Kiein: ofir. tab. 10. fg. 39. 
Argenv. Conch. tab. 26.1. Zoomorph. tab. 12. K. 
Bonann. recr. 2. tig. 49. Muf. kerch. 2. fig. 48. 
Knorr Fergn. 1. tab, 18. fig. 3. f. 11. f. 1. 
Born Mnf. Caf. Vind, tefl. tab, 2. fg. 15 —18. 
Chemn. conc. 6. tab, 14. fig. 142—146. 
2. Lister Conch. tab. 320. fig. 157. 
Inhabits the Indian Ocean: 2 l incnes long, and above 2 broad 7 
refembles the human heart: the ribs are placed obliquely, 
and before the beaks isa heart-fhaped deprefiure or gape: 
generally whitifh with fometimes a few red fpots; fometimes 
flat on each fide, fometimes concave on one fide. 
Rofeum, Shell heart-fhaped ; the fore-part furrowed with lines, the 
hind-part with ‘broader {tire, forming by their con- 
jun&ion the figure of a heart: one part convex, the 
other concave. ' à 
Lagen, 
