BRITISH MOLLUSCA. 
109 
u. Castle Cary. Presented by Miss Benett. 
v, w. Yorkshire. Presented by W. Sewell,, Esq. 
x — 2 , var. (U. rostrata, Pfeiffer). Erpingham, Norfolk. Pre- 
sented by the Rev. J. Bulwer. 
a a — c c, var. (ditto). River Bure, Norfolk. Presented by the 
Rev. J. Bulwer, 
dd — g g, var. (U. elongatula?). River Bure, Norfolk. Pre- 
sented by the Rev. J. Bulwer. 
h h (ditto). New River, London. 
2. Unio tumidus. 
Unio tumidus, Retzius , Nov. Gen. 17. n. 3; Gray , Man. L. Sf 
F. W. Shells , 297. t. 2. f. 13; Brown , III. Conch. G. B. 82. 
t. 32. f. 5-8 ; Spengler, Skrivt. Nat. Selsk. Kiob . iii. pt. i. 57 ; 
Kickx, Moll. Brab. 83 ; Hanley , Rec. Shells, i. 205. t. 2, Mya, 
f. 27 ; Forbes Sf Hanley , Brit. Moll. ii. 140. t. 40, f. 1. 
U. tumida, Pfeiffer , ii. 34. t. 7. f. 2, 3; t. 8. f. 1, 2; t. 2. f. 25, 
young; Rossrn. Icon. i. 117. t. 3. f. 70 a , b, ii. 27. 1. 14. f. 202 - 
204, vii. and viii. 41. t. 40. f. 542, xii. 32. t. 60. f. 772-778. 
Mysca solida, Turton , Bivalves, 246. t. 16. f. 2; Man. ed. 1. 22. 
f. 13. 
Mya ovata, Donovan, iv. t. 122 ; Mat. Sf Rack. Linn. Trans, viii. 
39 ; Turt. Conch. Diet. 106 ; Wood, Gen. Conch. 105. 1. 19. f. 5 ; 
Ind. Test. t. 2, Mya, f. 2 7 ; Dillw. Rec. Shells, i. 50. 
Mya ovalis, Pulteney Hutchins 5 Dorset, 27 (fide Mont.) ; Mont. 
Test. Brit. 34; Turton, Brit. Faun. 146. no. 180? 
Mya depressa, Donovan, B. S. iii. t, 101. 
Mysea ovata, Turt. Brit. Biv. 246 ; Man. L, Sf F. W. Shells, 
ed. 1. 21. f. 12 ; Leach, MSS . 1818, Ann. Sf Mag. N. H. xx. 272. 
Unio ovalis, Fleming, Brit. An. 416 ; Brown, III. Con. G. B. 82. 
t. 31. f. 1-4; Sow. Gen. Shells, Unio, f. 1; Reeve, Conch. 
Syst. i. 87- f. 1; Gray, Turton 9 s Man. L. Sf F. W. Shells, 29 7. 
t. 2. f. 12? (distorted specimen of Unio tumidus?). 
a — e. Bath River. 
/. York fosse. Presented by J. Phillips, Esq. 
g, h. York. Presented by P. Carpenter, Esq. 
i — n. Surrey Canal, 
o — q. Britain. 
r — v. New River, London. 
w (jun.). Warwickshire. Presented by Mrs. Corrie. 
x (polished specimen). Dock at Deptford. 
y, z (elongated, wdiite inside). Castle Ashby. Presented by 
the Marquis of Northampton. 
a a (very elongated, light salmon-coloured inside). Castle 
Ashby. Presented by the Marquis of Northampton. 
