258 WORMS. TESTACEA. 66. Oftrea. 
Mok of this genus are furnifhed at the hinge internally with 
numerous parallel tranfverfe grooves in each valve, and are 
immediately diítinguifhed from the Genus Arca, in not hav- 
ing teeth alternately locking in each other: the Scallops leap 
out of the water to the diftance of half a yard, and opening 
the fhells, eje& the water within them; after which they fink 
under the water, and fuddenly clofe the fheils with a loud fnap. 
A. Valves furnifhed with ears and radiate. Scallop. 
a. Atguelateral: ears of the valves equal. 
*Maxima. Shell with about 14 rounded and longitudinally ftriate rays. 
Donovan's Brit Shells, ii. tab. 49. 
Pennant. Brit. Zool. iv. tab. 59. fig. 61. 
Da Cofta Brit. conch. p. 140. tab. 9-8 
Lister. an. Ang. tab. 5. f. 29. Conch. t. Wo ae 
Bonan recr, 2. fg 8. Muf. Kirch. 2. f. 7. 
Gualt. teft. tab. 98. A,B £ 9g. A. 
Knorr Vergn. 1, tab. 14. f. 1, 2. & 2. t. 14. f. t. 
Regenf. conch. 1. tab. 2. f. 19. 1. 7. f. 9. 
Bytem app. tab. 12. fig 50. 
Chemn. conch. 7. tab. 60. y 585—587. 
2, Lister conch, tab. 168. a, 
3. Kuorr delic. nat, fel. tab, B. ii. fig. 2 
Knorr Vergn. V. tab. 4. fig. 2? 
Found in moft European feas, in large beds; whence they are 
dredged up, and pickled and barrelled for fale. ‘This is the 
fhell which was formerly worn by pilgrims on the hat or coat, 
as a mark that they had croffed the fea, for the purpofe of pay- 
ing their devotions at the Holy Land : in commemoration of 
which it is ftill preferved in the Arms of many families. 
Shell about $ inches long and 54 broad: ears laage, with decuf- 
fate ftrie: binge with a large deep hollow : Joaver-wasve con- 
vex, white, often varied with red bands or rh pots; upper-valye 
flat, reddifh. 
*Jacbea, Shell with about 14 angular and DET ftriate rays. 
Pennant Brit. Zool. iv. tab, 60. fig. 
Lifer conch. tab. 165, 166, Ds Me V 139. 
Bonan recr. and Muf. Kirch. 2. f, 3, 4. 
Knorr Vergn. 2. tab. 22. f. 3, 5+ te 22. J£. 4 and 6. t. 88. fA t. 
Gualt. teft. tab, 9o. B. 
Cbemn conch. 7. tab. 60, fig. 588, $89. 
Inhabits European feas; leís than the laft, 
Grooves of the fhel/ traniverfely flriate; xpper-valve flat, wit 
rounded rays, which are very finely ftriate tranfverfely ; Joxwe 
valve with angular rays, which are ftriate longitudinally : ears) 
concave and APER on the upper fide, 
Zicxa 
