60 THE ELEMENTS 



Most of the foreign, and a few of 

 the British Pectens, are very beauti- 

 ful shells. 



Genus 15th.— ANOMIA. Animal 

 an emarginate eiliate strap-shaped 

 body, with bristles or frin2:e affixed 

 to the upper-valve ; arms two, linear 

 longer than the body, connivent pro- 

 jecting, alternate on the valve and 

 eiliate on each side, the fringe affixed 

 to each valve ; shell bivalve, inequi- 

 valve, one of the valves flattish, the 

 other gibbous at the base with a pro- 

 duced beak, generally curved over 

 the hinge ; one of the valves often 

 perforated near the base ; hinge with 

 a linear prominent cicatrix and a late- 

 ral tooth placed within, but in the flat 

 valve on the very margin ; two bony 

 rays for the base of the animal. Linn. 

 Syst. 314. Plate 7th, fig. loth. 



Habitation, The Anomia have on-- 

 ly been found to inhabit the ocean. 

 The animal attaches itself to fuci, 



