9 o 



SHELLS. 



Class VI. 



Acuhaium. tin. Syft. 1 122. No* 78. . 



37. Acu- 



tEATED. 



C. with high ribs radiating from the hinge to the 

 edges ; each rib fulcated in the middle •, and near 

 the circumference befet with large and ftrong pro- 

 ceffes, hollowed. One fide of the fhell projects 

 further than the other, and forms an angle. Color 

 yeilowifh-brown. 



As large as a fife. The marginal circumference 

 ten inches and a half. 



Found off the Hebrides and Orknies. 



Tai.L fig. 37 . 



Echinatum. Lin, Sjft. 1122. No. 79. Faun. Suec. No. 2139. 



38. Echi- Lift. Angl. tab. v. jig. S3- Conch, tab. 324; 



KATED. 



C. leffer than the former, being little more than 

 fix inches in circumference -, the color white -, the 

 ribs echinated higher up •, has only fixteen ribs, the 

 former twenty-one ; the fhape rounder. 

 Found dead on many of our mores. 



Ciliart. 

 39. Frin- 

 ged. 



Lin. Syjl. 1 1 22. No. 80. 



C. with a very brittle fhell, and delicate ; of a 

 pure white ; eighteen ribs rifing into thinner fpines. 



Of 



