276 



Spondilo' 

 idea. 



WORMS. TESTACEA. 66. Oftrea. 



■ « 



Shell equivalye, pellucid, flattened, oval, beaked, glabrous, 

 with perpendicular undulate granulate ftrise on the 

 upper- valve: margin very (harp. 

 Chemn. conch. 8. tab. 72. fig. 669, 670. 



Inhabits India ; 3 inches 2 lines long, 2 inches 5 lines broad : 

 fell white with a few tawny fpots. 



Forjkahlii, Shell plaited and terminating in a long incurved hollow 

 beak ; the middle ribs with imbricate fpinous wrinkles \ 

 the other valve flat. 



Chemn. conch, 8 tab. 72.fg.6j1* a, c. 



Jnhabics the Red fa : 2 inches 3 lines long, and about an inch 

 broad : the flat valve whitifh, the other iubviolet. 



flicatula. Shell with longitudinal wrinkled plaits ; the lower-valve a 

 little lefs and flatter. 



Qualt. teft. tab. 104, /?£. A. 



Chemn, conch. 8. tab. 73. fig, 674. 



Inhabits A?nerican and Mediterranean Teas : varies very much in 

 ihape and iize, but is generally cinereous with a mixture of 

 violet, fometimes white with red or blueifh ftreaks. 



Rostrata* Shell oblong, rugged; the upper- valve lamellate with a 

 denticulate margin, the other excavated and lotfgitudif 

 nully grooved : beak prominent, 



Gualt.teft, tab, 102, fig, D. 



Lhemn, conch. 8- tab. 73. fg,6j6. 



Inhabits the Mediterranean: upper -valve yellowifh-green, the 

 other violet varied with white ; within cretaceous or chalky- 

 white. 



Virginica, Shell nearly equivalve, thick, rough, lamcllous; one valve 

 with a prominent beak. ■ 

 Lifter conch, tab. 200. fig, 34. 

 Chemn. conch. 8. tab, 73. fig. 6yj m 

 2. Lister conch tab. 201. f 35. 

 Chemn, conch. 8. tab. 74. fg. 678, 



Inhabits American and Indian Ocean : 9 inches long and 4 broad : 

 whitifh or ochraceous, within glofly-white. 



Cirnucctia- Upper-valve flat, lower- one hollow and filiate, rough with 

 fcales, wrinkles and plaits, and ending in an elongated 

 beak. 

 Born Muf C<ef. Vind, teft. tab. 6, fig. 1 1, 12, 

 Chemn. conch. 8. tab 74. fg. 679. 

 Inhabits the Indian and' African ocean 



Tar a- 



