OF NORTHUMBERLAND AND DURHAM. 191 
From deepish water, not rare. Dredged in seventeen fathoms 
by Mr. R. Howse. 
111. THRACTA, Leach. 
1. T. convexa, 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. pHAsEouiIna, Lam. 
Mya pubescens, small variety, Mont. Test. Brit. 40. 
Thracia phaseolina, Kiener. 7, t. 2, f. 4. 
On sandy beaches, not uncommon. 
3. T. vitLostuscuLa, JJacg. 
Anatina villosiuscula, Macg. in Edinb. New Ph. Journ. ii. 
3105. T, f 10; 11. 
Thracia ovata, Brown, Hust. Ree. 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 7. pubescens (our 7. pha- 
seolina ). 
112. ANATINA, Lamarck. 
1. A. prateNvIs, Petiver. 
Mya pretenuis, Mont. Test. Brit. 41, t. 1, f. 2. 
On sandy beaches, rare. Newbiggin.—J. A. South Shields 
sand.—A. H. 
2. A. pistorta, Mont. 
Mya distorta, Mont. Test. Brit. 42, t. 1, f. 1. 
Cullercoats, rare. In a piece of limestone from deep water.— 
J. H. F. 
