332 DONACID.E. 



from the margin. Hinge composed of two primary teeth 

 in one valve, and one in the other, with accessory lateral 

 teeth. Ligament short, external. 



Animal oblong, its mantle freely open in front, with 

 fringed, or jjartially fringed (or plain ?) margins. Siphons 

 separated to their bases, the branchial with pinnated eirrhi 

 around its orifices, the anal with simple denticulations. 

 Foot very large, apiculated, sharp-edged. Branchial 

 laminae on each side distinctly separated. Labial palps 

 long and triangular. 



D. ANATiNus, Lamarck. 

 Inner margin crenulated ; hinge with lateral teeth. 



Plate XXI. figs. 4, 5, and 6, and (animal) Plate K. fig. 7. 



Lister, Hist. Conch.pl. 37G, f. 217. 



Donax trunadus, Linn. Syst. Nat. cd. 12, p. 1127, partly (not of Mus. Ulric). 

 — Penn. Brit. Zool. ed. 4, vol. iv. p. 93, pi. 65, f. 45.— 

 PcJLTENEY, Hutchins, Dorset, p. 32. — Donov. British Shells, 

 vol. i. pi. 29, f. 1.— Mont. Testacea Brit. pt. i. p. 103.— 

 Dorset Catalog, p. 33, pi. 6, f. 3. — Turt. Conch. Diction, 

 p. 41. — Turt. Dithyra Brit. p. 123. — Flem. Brit. Anira. p. 

 433.— Macgilliv. Moll. Aberd. p. 275. — Brit. Marine 

 Conch, p. 77.— Brown, 111, Conch. G. B. p. 97, pi. 39, f. II. 

 — DiLLW. Recent Shells, vol. i. p. 150. — Index Testaceolog. 

 pi. 6, Donax, f. 5. — Mawe, Conchology, pi. 9, f. 5. — 

 Crouch, Introd. Conch, pi. 6, f. 5. 



Cuneus v'Utatus, Da Costa, Brit. Conch, p. 207, pi. 14, f. 3. 



Donax analinum. Lam. Anim. s. Vert. (ed. Desh.) vol. vi. p. 249. — Hanl. Re- 

 cent Shells, vol. i. p. 83. 



Donax nfier (YOUNG), Turt. Dithyra Brit. p. 127, pi. 10, f. 14.— Flem. 

 Brit. Anim. p. 434.— Brit. Marine Conch, p. 79. — 

 Brown, 111. Conch. G. B. p. 97, pi. 13, f. 13. 



This extremely common shell is not the D. truncidus of 

 Continental writers, although perhaps equally entitled 

 (since both conjointly received this epithet from Linnseus) 

 to be termed so ; nevertheless, as the appellation cannot 

 be retained for more than one of them, it is held advisable 



