PLATE IV. 



Lutraria. Inhabits mud. 

 Fig. 



1 . L. intermedia ?, Sowb. — Perhaps only the young of L. elliptica. 



2. L. elliptica, Lamk. — Mactra lutraria, Linn. — Scarborough, Tor- 



bay, Dublin, Forth, Lerwick, etc., C. Broad, oval. 



3. L. oblonga, Chemn. — (Mga) L. solenoides, L. Mans, Mactra /nans, 



Chama magna. — Cornwall, Devon, etc., Mc. Arched, narrow. 



Tapes. Burrows in mud and stone. 



4. 5. T. pullastra. — Wood. — Venus pullastra, V. perforans (var. f. 



4), Venerupis, micleus, Pullastra vulgaris, etc. — Plymouth, Scar- 

 borough, Swansea, Forth, etc., C. 



6. T. decussata, Linn. — (Venus) V. litterata, V. fiorida, Venerupis 



and pullastra d. — S. Devon, Weymouth, Tenby, etc., Mc. Ob- 

 long, coarsely decussated. 



7. T. aurea, Gmel. — (Venus) V. nebulosa, V. anea, V. nitens, V. si- 



nuata, Pullastra a. — Cornwall, Sussex, Bantry Bay, Loch Ryan, 

 Mc. Yellow within. 



8. T. vtrginea, Linn. — (Venus) V. rhomboides, V. samiensis, V. 



virago, Cuneus fasciatus. — Various British loc, C. Pink 

 within. 



Lucinopsis, Forbes and Hanley. Sandy ground. 



9. L. undata, Pennant. — (Venus) V. sinuosa, V. incorrupta, Lucina 



undata. — Esm., Scarborough, Man, etc., 5 to 80 fathoms, M.Il. 

 Orbicular, flexuous at side. 



Artemis. 



10. A. exoleta, Linn. — (Venus) Cgtherea e. Pectunculus capillaceus. 



— Sandy ground, on Brit. co. generally, low- water to 80 fath., 

 C. Compressed ; striae coarse. 



11. A. lincta, Pult. — (Venus) V.sinuata, Cgtherea sinuata. — Various 



Brit, loc, C. Dorsal edge sloping ; striae fine. 



Venus. 



12. V. casina, Linn. — V.reflexa, V. lactea, V. discina. — Northumber- 



land, S. Devon, Man, Bantry, Skye, etc., Mc. Concentrically 

 laminated. 



13. V. verrucosa, Linn. — V. erycina, V. cancellata, etc. — Devon, 



Cornwall, Channel Ms., etc., C. Ventricose, warted. 



14. V. fasciata, JDonov. — Various southern Brit, loc, C. Eound, 



with thick ribs. 



