542 MANUAL OP THE MOLLTJSCu. 



PLATE XXIII. 



* The interiors marked are left valves. 



Myacidce. 

 ^ Pase 



l.«Mya truncata, L. \. Brit 480 



2. Corbiila sulcata, Lam. W. Africa 490 



3. {Toiamomya) labiata, Maton sp. |. Buenos Ayres 490 



4. {Sphenia) Binghami, Turt. Brit 490 



5. Neoera cuspidata, Olivi. Brit 491 



6. Anatinella Candida, Cliemn. |. Ceylon 479 



Anatinida;. 



7. Anatina subrostrata, Lam. h India 495 



8. Cochlodesma prsetenue, Mont. Brit • 49o 



9. Thi-acia pubescens, Pult. \. Brit 496 



10.*Lyonsia Norvegica, Chemn. sp. f . Brit 498 



11. Pandora rostrata, Lam. f ^— nsey 499 



12. Myodora brevis, Stutch. Is'ew Soutn Wales 499 



13. Myocbama anomioides, Stutch. New South Wales 499 



14. Chamostrea albida, Lam. sp. i. New South Wales 500 



Gastrochccnidcc. 



15. Gastrochcona modiolina, Lam. Galway 501 



J 5a ■ sp. siphonal orifices, in U. Greensand, Haldon, 



Devonshire ^^^ 



](5. mumia, Spengl. A. India 501 



17. Clavagella bacillaris, Desh. h Pliocene, Sicily 502 



18. Aspergillum vaginiferum, Lam. \. Bed Sea 503 



Tholadidce. 



19. Pholas Bakcri, Desh. \. India 504 



20. [Fholadidea) papyracea, Solr. §. Brit 50o 



21. {Martcsia) striata, L. W. Indies 505 



22. • {FarapJiolas) bisulcata, Conrad 506 



23. Xylophaga dorsaHs, Turt. Brit 506 



24. 25. Teredina personata. Lam. London Clay, Bognor 507 



2,5a. siphonal orifice 



26. *-Teredo Korvegica, Spengl. Brit ^06 



07 siphonal end of the tube, broken to show 



septa , 50G 



28. palmulata, Turt. (styles). Brit 50 i 



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