OF JTOHViIUMBERLAND AND DURHAM. 97 



From deepish water, not rare. Dredged in seventeen fathoms 

 by Mr. R. Howse. 



111. THRACIA, Leach. 



1. T. CON VEX A, Wood. 



Anatina convexa, Turt. Brit. Biv. 44, t. 4, f. 1, 2. 

 From the fishing boats, Cullercoats, rare. — A. H. Whitburn. 

 — Rev. G. C. Abbes. Only single valves have occurred. 



2. T. PHASEOLINA, LciVl. 



Mya imbescens, small variety, Mont. Test. Brit. 40. 

 Thracia phaseolina, Kiener. 7, t. 2, f. 4. 

 On sandy beaches, not uncommon. 



3. T. VILLOSIIJSOULA, Macfj. 



Anatina villosiuscula, Macg. in Edinb. New Ph. Journ. ii. 



370, t. 1, f. 10, 11. 

 Thracia ovata, Brown, Illust. Bee. Conch. 110, t. 44, f. 4. 

 From deeper water than the last, rather rare. 

 This is rather a doubtful species, but we think may prove dis- 

 tinct. It is shorter posteriorly than the last, and has the lower 

 angle of the pallial sinus much more obtuse. The ligamental 

 plate of the hinge is also a little less produced. The Thracia 

 ovata of Capt. Brown, founded on a specimen got on Cullercoats 

 sands, we take to be synonymous with A. villosiuscula, Macg., 

 though Capt. B. refers the latter to his T. pubescens (ovlt T. pha- 

 seolina). 



112. ANATINA, Lamarck. 



1. A. PR.ffiTENUis, Petiver. 



Mya prcetenuis, Mont. Test. Brit. 41, t. 1, f. 2. 



On sandy beaches, rare. Newbiggin. — /. A. South Shields 

 sand. — A. II. 



2. A. DisTORTA, Mont. 



Mya distorta, Mont. Test. Brit. 42, t. 1, f 1. 

 Cullercoats, rare. In a piece of limestone from deep water. — 

 J. H. F. 



