PLATE VI. 



MONTACUTA. 

 Pig. 



1. M. FEERDGINOSA, Mont. [Mi/a.) — M. oUonga, M. glabra, Tcllimya 



ellipiica, Urycina/.—S. Devon, Scarborougli, Tenby, Cape Clear, 

 etc., Mr. Wedge-shaped, lonix. 



2. M. BWK^TATA, Monf: {Mj/a.) — Erijcina, Petricola, and TeUimya h. 



— Newcastle, Weymouth, Dublin, etc. Burrows in dead shells, 

 Mr. Short, subquadvate. 



3. M. SUBSTRIATA, Moiit. {Ml/a.) — Erycina and TeUimya s. — Devon, 



Tenby, Durham, Zetland, Bantry Bay, etc., on spines of Spaian- 

 gus, deep water, C. Minute, with diverging stfise. 



TUETONIA. 



4. T. MiNUTA, 0. Fair. [Venus.) — Mya purpurea, etc. — Scarborough, 



Tenby, Cork, Oban, etc., C. 



Kellia. 



6. K. suBORBicuLARis, Moiit. [Mya.) — Bornia ivjlata, Tellhia and 

 TeUimya s. — Anglesea, Portland, Zetland, etc., lovr-water to GO 

 fath., Mr. 



6. K. LACTEA, Brown, {TeUimya.) — Brit. co. generally. More ob- 



long than K. sub. 



7, 8. K. RUBRA, Mont. [Cardium.) — Poronia r., etc. — Numerous lo- 



calities ; littoral, C. 



Lepton. 



9. L. SQUAMOSUM, Mont. — Solen and Lntraria s. — Salcombe Bay, 

 Tenby, Cork, etc., R. Flat, subquadrate. 



10. L. NiTiDUM, Tart. {KeUia.) — Torbay, Skye, R. Less square and 



flat than L. squamosum. 



11. L. CONVEXUM, Alder. — Bantry Bay, Er. Convex, granulated. 



12. L. Clarki^, Clark. — Exmouth, Plymouth, Zetland, llr. Minute, 



oval, smooth. 



13. L. SULCATULUM, Jeffr. — Annals, Feb. 1859. Guernsey, Mc. Con- 



centrically wrinkled. 



Galeomma. Adheres to rocks by byssus. 



14. 1.5. G. TuRTONi, Sowb. — Channel Islands, and Exmouth. Oblong, 



gaping. 



Cyclas. Inhabits fresh-water. 



16. G. CORNEA, Linn. {Tellina.) — Sp/iarit/m c, Scopoli, C. rivalis, etc. 

 — Ponds and ditches everywhere. Equilateral, subquadrate. 



