226 ANATINID.E. 



preceding, but the shell is rather broader in proportion, 

 from its more abbreviated shape. 



The animal, according to Mr. Clark, is in every respect 

 similar to that of T. phaseolina. It is occasionally taken 

 in deep water upon the Northumbrian coast (Alder) ; at 

 Exmouth (Clark) ; and in Cornwall (Alder) : Swansea, 

 Bantry bay, Ross-shire, and Lerwick (Jeffreys). It is not 

 uncommon on the west coast of Scotland (Alder), where it 

 was first discovered and named by Professor Macgillivray. 



T, PuGEscENs, Pulteney. 



Oval-oblong, biangulated behind, of a pale sand colour, never 

 pure white, devoid of all lustre, scabrous : sides equal or very 

 nearly so ; hinder dorsal edge moderately sloping : hinge-plate, 

 notched in front. 



Plate XVI. figs. 2, 3. 



? Mya declivis, Pennant, Brit. Zool. ed. 4, vol. iv. p. 79. 

 Mr/a pubescens, Pulteney in Hutchins's Dorset, p. 27. — Mont. Test. Brit. p. 

 40, and Suppl. p. 1G6 (chiefly). — Turt. Conch. Diction, p. 

 99, f. 35. 

 „ declivis, Donov. Brit. Shells, vol. iii. pi. 82. — Linn. Trans, vol. viii. p. 36. 

 —Dorset Catal. p. 28, pi. 4, f. 6.— Wood, General Conch, p. 

 93, pi. 18, f. 1, 2.— DiLLW. Recent Shells, vol. i. p. 43 (not 

 variety). 

 Anatina Myalis, Lam. Anim. s. Vert. (ed. Desh.) vol. vi. p. 80. — Crouch, Introd. 



Conch, pi. 4, f. 1. — Deless. Recueil Coquilles, pi. 3, f. 3. 

 Anatina 2nd)escens, Turt. Dithyra Brit. p. 45. — Brit. Marine Conch, p. 41. 

 Thracia pubesccns, Kiener, Coq. Viv. Thracia, p. 5, pi. 2, f. 2. — Storer, trans- 

 lat. Kien. Thracia, p. 5. — Couthouy, Boston J. Nat. 

 Hist. vol. ii. p. 135. — Desh. Encyclop. Method. Vers, vol. 

 iii. p. 1039 — Exp. Moree Zool. p. 87, 3rd ser. pi. 18, f. 1, 

 2.— Hanl. Recent Shells, p. 21. 

 Ampliidesma pvbescens, Flem. Brit. Anim. p. 431. 

 Thracia declivis, Brown, 111. Conch. G. B. p. 109, pi. 44, f. 5. 



It is by no means improbable that Pennant's M?/a 

 declivis was identical with this species ; at least, Montagu 

 declares that the Portland specimen, the traditional type of 



