■#6 CON C H 
pumcea. 63. T. oval, flat, equal fided, tranfverfely ftriated j 
I inch long, 2 broad. 
comf>la- 64. T. obovate, flattened 3 obfoletely ftriated, red- 
nata. dilh, with a dilated margin 3 2 inches long, 3 broad, 
fob'ula . * 65. T. ovate, compreffed, inflated, lengthened be- 
fore 3 one valve fmooth, the other with oblique, re- 
fiedted ftrise. Med iterranean, American and North 
feas, Wales. 
adanfoni . 66. T. whitifh, with a violet hinge. Africa. 
cancellata. 6 7 . T. thin, with numerous longitudinal grooves 
eroding the tranverfe wrinkles. Atlantic. 
Jlrigofa. 68. T. with whitifli bands, glabrous and wrinkled 
at the. margin, African (bores. 
O L O G Y, ■ Chap, IV. 
94 ■ T. tranfverfely ftriated, orbicular, angular on polygona, 
the fore-part. India, 
Gen. 7. CaRDIUM, Cockle. Cardiura. 
Gfirt, Char . — The animal is- a telhys : the (hell is bi- 
valve, nearly equilateral, equivalve, generally con- 
vex, longitudinally ribbed, ftriated or grooved, with 
a toothed -margin. Hinge of the two teeth near the 
beak, and a larger remote lateral one on each fide 3 
each locking into the oppofite. 
Species . 
C. Suborbicular. 
balaujlina . 69. T. dilated, orbicular, lateral teeth in one valve, 
Mediterranean. 
remies . 70. T. compreffed and tranfverfely wrinkled 3 3 inches 
long, 34 broad. Indian and American oceans. 
reticulata. 71. T. lentiform, compreffed, reticulate. India. 
fcobitina . 72. T. lentiform, rough, with lunated feales difpof- 
ed in a quincunx 3 2-J inches long, broad. Indian 
ocean. 
la&ea . 73. T. lentiform, gibbous, white, pellucid, fmooth , 
Mediterranean. 
carnaria. ' * 74. T. white, with a rofy tinge within and without ; 
fine ftrite, diipoied obliquely. Europe and American 
illands, Britain. 
bimaculata* 73. T. triangularly rounded, fmooth, whitifli, with 
two oblong red fpots on the infide 3 fcarcely an inch 
broad. Europe and American feas, Britain. 
baltliica. 7 6. T. roundifh, fmooth, outfide bloom colour 3 fize 
of a horfe bean. Baltic. 
pijiformis . 7.7. T. fubglobular, fmooth, obliquely fubftriated 3 
fize of a pea ; mouths of rivers in Europe. 
di’varicata. 78. T. fubglobular, white, with oblique bifarious 
ftrise. American feas. 
dtgitaria. 79. T. fubglobular, pale, furrounded with oblique 
uniform ftrias ; fize of a pea, nearly an inch long, Ame- 
rican arid Indian feas.' 
cornea . * 80. T. globular, glabrous, horn colour, with a tranf- 
verfe grooye •, fize of a pea. Ponds and frefh waters of 
Europe, Britain. 
lacujlris. 81. T. rhombic, flattiflr, glabrous, with an acute pro- 
tuberance. Pools and marfhes of Europe. 
smnea. 82. T. heart-fhaped, tranfverfely grooved. Pools 
and ditches of Europe. 
Jhaninalis. 83. T. triangular, gibbous, tranfverfely ftriated. Ri- 
ver Euphrates. - 
Jluminea. 84. T. triangular, gibbous, tranfverfely ribbed. China. 
Jluviatilis. 85. T. triangular, tranfverfely wrinkled. Canton. 
iberica. 86. T. globular, fmooth, poliflied. Shores of Ibe- 
ria. 
ad via tic a. 87. T. fubglobular, margined, denticulated, white 
without, pearly within. Shores cf the Adriatic. 
Jinuofa. 88. T. fubglobular, equivalve and equal-fided, with 
a few tranfverfe ftrise. 
purpurata. 89. T. equal fided, fmooth, lucid purple colour 5 one 
inch long, i~ broad. 
Candida. 90. T. white, with fine tranfverfe ftrise. 
gallica. 91. T, triangular, pectinated, France. 
Jenegaleti- 92. T. triangular, globofc, with tranfverfe grooves. 
Jie. Africa. 
cingu/ofa. 93. T.' oval, flattith, tranfverfely ftriated, fore-part 
angularly inflected. America. 
1. C. gibbous, equivalve, with elevated, carinated, cojlatum. 
concave, membranaceous ribs 3 three inches long, three 
and a half broad, three high. African ocean. 
2. C. heart-fhaped, valves compreffed and carinat- cardijfa-. 
ed with teeth 3 two inches and a half long, above two 
broad. Indian ocean. 
3. C. heart-fhaped ; fore part furrounded with lines, rofeum. 
hind part with broader ftrise, forming by their union 
the figure of a heart. Nicobar illands. 
4. C. heart-fhaped ; valves ftriated, notched 3 behind retufum. 
the beaks a lunated heart-fhaped gape 5 two inches 
long, and nearly the fame breadth. India, Arabia, and 
Egypt. 
5. C. heart-fhaped, fubquadrilateral 3 valves carina -hemicar- 
ted, beaks diftant. Indian ocean. dium. 
6 . C. heart-fhaped, fuktrilateral 3 valves tranfverfely lithocar~ 
grooved, and the fore-part longitudinally ftriated 3 has dium. 
only been found in the fofiil ftate. 
7. C. heart-fhaped, carinated ; fore-part obliquely lincatum, 
truncated, thin, quite fmooth, fnowy, with gilt ftrise 
above an inch long. 
* 8. C. fomething heart-fhaped, fubangular 3 valves an- medium , 
gular, grooved, fmooth. European and American feas, 
coali of Durham. 
* 9. C. feme what heart-fhaped, ribs high, and grooved aculeatum. 
down the middle, and befit with large hollowed fpir.es 
near the circumference. European and Mediterranean 
feas, Devor.fhire. 
* 10. C. fiightly heart-fhaped 3 ribs fpinous, carinated • echinatum* 
European feas, Britain. 
* xi. C. flightly heart-fhaped, triangular ribs, befet ciliare. 
along the ridges with thin f’pines 3 fize of a hazel-nut. 
European feas, Cornwall. 
12. C. flightly heart -ihaped., with elevated, fubtri- cilia turn. 
angular, ciliated grooves. North feas. 
13. C. fomewhat heart-fhaped, with obtufe, knotty, tubercu- 
tranfverfely ftriated grooves. Mediterranean. latum. 
14. C. heart-fhaped, with arched iipijpricated feales ifocardia. 
along the grooves. Mediterranean. 
15. C. fomewhat heart-fhaped, fubangular. India. fragum. 
16. C. fubcordate, with lunated, coloured grooves, unedo. 
India. 
17. C, fubcordate, grooved, and muricated at the muricaturti 
fides. America. 
18. C. oblong, with angular grooves, ferrated at the magnum. 
fide. America and India. 
19. C. fubovate, grooved 3 anterior margin rough ,jiavum. 
pofterior one toothed. India. 
* 20. C. obovate, with obfolete, longitudinal ftrise, lavigatum : . 
and a few tranfverfe ones concealed by a gloffy, yel- 
lowifh brown epidermis, European and American feas, 
Britain, 
21. C. 
