408 TELLINID.E. 



ing small rolls of bread ; and lie adds that it was col- 

 lected by means of a rake and net called a "rullo." 

 According to Philippi D. trunculus is still esteemed a 

 delicacy in the sonth of Italy, and known in Sicily as 

 " cozzola." M 'Andrew says it is as common on the 

 table as on the shore at Malaga, being procured by men 

 wading with nets as in England for shrimps. It may 

 also be seen with other " frutti del mare " in the fish- 

 market at Genoa. 



The present species is the Serrula laviyata of Chem- 

 nitz (not his Donax laevigata) and D. anatinum of La- 

 marck; Risso contrived to make half a dozen species 

 out of it. 



B. Inside margin smooth, or minutely crenulated in the adult. 



3. D. politus*, Poli. 



Tcllina polita, Poli, Test. Sic. i. p. 44, t. xxi. f. 14, 15. D. politus, F. & H. 

 i. p.33($,pl.xxi.f.7. 



Body yellowish-white : tubes cylindrical, short, thick, smooth 

 but lineated, crowned with plain cirri : foot lanceolate, white. 

 (Poli.) 



Shell triangularly oblong, not very inequilateral, much 

 compressed, with a greater convexity in the umbonal part, 

 rather thick, opaque, lustrous : sculpture, scarcely any other 

 than a few slight and indistinct concentric lines, and occasional 

 marks of growth which alone are perceptible by the naked 

 eye : colour chestnut blended with olive, beautifully marbled or 

 necked with creamcolour and marked with a conspicuous lon- 

 gitudinal ray of the same tint, which proceeds from the beak 

 and is obliquely curved towards the ventral margin on the 

 anterior side ; this ray becomes broader as it approaches the 

 margin, being there of a considerable width in full-grown 

 specimens ; the beaks are usually violet or flamecolour, and 

 variegated by a blotch of dusky purple under the ligament, 

 and sometimes by a similar but fainter stain on the other side 

 of the beak ; the lines of growth are also distinguished by 

 narrow bands of violet when that hue appears : epidermis thin 



* Polished. 



