PLATE XVI. 
Fig. 1, 2. PSAMMOBIA ferboensis. 
PsAMMOBiA Ferroensis, Lam. Syst. v. p. 512. 
Tellina Ferroensis, Mont. Test. Brit. p. 55. 
Tellina trifasciata, Don. Brit. Sh. pi. 60. — Browti in Ency. Brit. vi. p. 407. 
Fig. 3. PSAMMOBIA vespertina. 
PsAMMOBiA vespertina. Lam. Syst. v. p. 513. 
Solen vespertinus, Mont. Test. Brit. p. 54. 
Tellina variabilis, Bon. Brit. Sh. pi. 41, fig. 2. 
Fig. 4, 5, 6. PSAMMOBIA jugosa. 
PsAMMOBiA jugosa, Browti's MSS. 
Tellina jugosa, Brown in Wern. Mem. ii. p. 506, pi. 2, 4, fig. 2. 
Fig. 7. PSAMMOBIA punctura. 
PsAMMOBiA punctura. Brown's MSS. 
Solen squamosus, Mont. Test. Brit. p. 565. — Mat. and Rack, in Linn. Trans, viii. p. 48. 
Fig. 8. ARCOPAGIA crassa. 
Arcopagia crassa, Leach's MSS. 
Tellina crassa, Mont. Test. Brit. p. 65. 
Tellina rigida, Don. Brit, Sh. pi. 103. — Mat. and Rack, in Linn. Trans, viii. p. 55. — Brown in Ency. Brit. vi. p. 408. 
Fig. 9, 10. ARCOPAGIA ovata. 
Arcopagia ovata. Brown's MSS — A new species. Found by W. C. Trevelyan, Esq. at Newbigging, Northum- 
berland — In the cabinet at Wallington. 
Fig. 11. MYSIA ROTUNDATA. 
Mysia rotundata. Brown's MSS. 
Mysia Montagui, Leach's MSS. 
Tellina rotundata, Mont. Test. Brit. p. 71. 
Fig. 12. TELLINA depressa. 
Tellina depressa. Mat. and Rack, in Linn. Trans, viii. p. 51. 
Tellina squalida, Mont. Test. Brit. p. 56 — Don. Brit. Sh. pi. 163 — Brown in Ency. Brit. vi. p. 407- 
Fig. 13. TELLINA punicea. 
Tellina punicea. Mat. and Rack, in Lin7i. Trans, viii. p. 50. 
TeUina laeta, Mont. Test. Brit. p. 57. — Don. Brit. Sh. pi. 123. — Brown in Ency. Brit. vi. p. 407. 
Fig. 14. TELLINA solidula. 
Tellina solidula, Mont. Test. Brit. p. 63.— Mat. and Rack, in Linn. Trans, viii. p. 58. 
Fig. 15. TELLINA striata. 
Tellina striata, Mont. Test. Brit. p. 60, pi. 27, fig- 2 — Mat. and Rack, in Linn. Trans, viii. p. 53. 
Fig. 16. TELLINA donacina. 
Tellina donacina, Mont. Test. Brit. p. 58, pi. 27, fig. 3 Mat. and Rack, in Linn. Trans, viii. p, 50, pi. 1, 
fig- 7. 
