PLATE III. 



PsAMMOBiA. Inhabits sand and mud. 

 Fig. 



1. P. FEEROENSis, Chemti. — {Tellina) T. incarnafa, T. radiafa, T. 



trifasciata, T. truncata. — Brit. co. generally ; coralline, C. 

 Oblong, keeled and angulated behind. 



2. P. cosTULATA, Turt. — P. discors. — Torbay, Cornwall, Skye, etc., R. 



Ribbed behind. 



3. P. Teltjnella, Lamk. — P. jlurida. — Exmouth, Guernsey, Tenby, 



Bantry B., Oban, Zetland, etc., 5 to 50 fath., C. Oval, smooth. 



4. P. Vespertina, Cliemn. — [Lux V.) Solen, Sanguinolaria V., Tellina 



depressa, variabilis. — Weymouth, Scarborough, Tenby, Bantry, 

 etc., Guernsey, C. Not angular nor keeled behind. 



Tellina. 



5. T. CRASSA, Penn. — T. macnlata, T. ri(jida. — S. Devon, Guernsey, 



Man, Tenby, Bantry, Forth, etc., low-water to 15 fath., C. 

 Thick, orbicular. 



6. T. BALAUSTiNA, Linn. — Birterbuy, Skye, Exmouth, Rr. as British. 



7. T. DONACiNA, Linn. — T. trifasciata, T. variegata, T. Llantivyi. — 



Various British loc, and S. Europe, 5 to 50 fath., C. Wedge- 

 shaped. 



8. 9. T. PROXiMA, Brown. — Var. T. calcarea (9), T. ovalis, T. sordida, 



Sangulnolaria sordida, Macroma tenera. — Skye, etc., R. 

 10, 11. T. PYGxM^A, Phil. — Devon, Cork, Shetland, etc., 8 to 50 fath., 



C. Smaller, more convex, and more truncate than T. donacina. 

 12, 13. T. tenuis. Da Costa. — T. jdanata, T. polita, T. exigua. — On 



sandy shores, in various localities, C. Flat, thin. 



14. T. INCARNATA, Linn. — T. sqiialida, T. depressa. — Devon, Bantry, 



Tenby, R. Flat, beaked. 



15. T. SOLIDULA, Pjdl. — T. rubra, Da Costa, T. carnaria, T. zonata, 



Psammobia solidula, T. Balthica. — All British coasts ; littoral, 

 C. Thick, inflated. 



16. T. TABULA, Gronovius. — T. discors. — On sandy shores generally, C. 



Valve with oblique striae (omitted by error). 



Ervillia. 



17. E. castanea, Mont. — [Bonax) Mesodesma c., Capsa c. — Cornwall 



and Scilly Isles, R. Ligament within. 



Scrobicularia. 



lb. S. PIPERITA, Gmel. — Generic syn. : Mya, Venus, Trigonella, Mactra, 

 Lutraria, Lisfera. — Specific syn. : hispanica, borealis, plana, 



