252 WORMS. TESTACEA. 65. Arca. 
Afra, Shell whitifh, covered with a whiter fkin, with deculfate 
ftriz, grooved and obliquely truncate, 
Inhabits Africa. dans, feneg. 1. tab. 18. fig. 8. 
Shell 4-5 lines long and 3 broad : longitudinal grooves 40-—50, 
tranfverfe ones 20: beaks approximate : margin clofed. 
Fofflis. ^ Shell thick roundifh, longitudinally ftriate and tranfverfely 
ribbed ; the ribs with v RS ítriz. 
Schrat. neue litterat 2, fig. 
Found in a foflile ftate in ie ‘Dutchy of rat 3 inches 
long, 3 + x broad. 
Cancellata, Shell with cancellate ftria and bearded; the margin gaping | 
in the middle. 
Schrat. Einl. Conch. 3. tab. 9. fig. 2. 
Inhabits the American Ocean; covered with a mofly fkin, under 
which it is brownifh, outwardly mixed with white with 4 
tufts of hairs: deaks flightly recurved with a lanceolate de- 
preflion behind them, 
Mimua, Shell alittle compreffed, tranfverfely ftriate, tapering at the 
remoter end and rounded at the oppofite ones. 
Chemn. conch. 10. tab. 170. fig. 1657, 1658. 
Inhabits the Greenland Seas; refembles a "Mya: 22 lines Jong: 4 
' broad: ochraceous, glabrous, clofed: beaks connivent white 
acute not ftriate. 
C. Margin crenate: beaks recurved. 
* Lafea. Shell fubrhombic any with obfolete decuflate ftriz, 
Liflér conch. tab. 235. fig. 69. 
Bonann, recr. 2. fig: 34- ds kirch. 2. f. 33. 
Chemn. conch. 7. tab. $5. fig. $47- 
Inhabits moi. Europcar Seas: fize of a horfe-bean: Jeaks ap- 
proximate, 
‘odulofi Shell oblong with ftriate tubercles: beaks incurved remote; 
margin entire clofed. 
Mull. Zool. Dan. prodr. 2984. 
I nhabits Denmark ; reiembles the laft. 
Shell obliquely heart-fhaped, with numerous unarmed 
^ grooves. 
Lister conch. tab. 2 $0» Jg. 64. 1.236. f. 70. 
Adans feneg. 1. tab. 183 fig. 7+ Barbut. t. 8. fe m 
Bonan rtcr. and Muf. Kirch, 2. fig» 731 74 
Antiquatas 
Rumpf* 
