MANUAL OF THE MOLLUSCA. 23 



PLATE XXIII. 



* The interiors marked are left valves. 

 Myacida. 



PAGE 



l.*Mya truncata, L. . Brit 317 



2. Corbula sulcata, Lam. W. Africa 317 



3. (Potamomyd) labiata, Maton sp. . Bueaos Ayres 318 



4. (Spkenia) Binghami, Turt. Brit 318 



5. Nesera cuspidata, Olivi. Brit 318 



6. Anatinella Candida, Chemn. f. Ceylon 309 



Anatinida. 



7. Anatina subrostrata, Lam. \. India 321 



8. Cochlodesma prsetenue, Mont. Brit 321 



9. Thracia pubescens, Pnlt. . Brit 822 



10.*Lyonsia Norvegica. Chemn. sp. f. Brit 323 



11. Pandora rostrata, Lam. f. Guernsey 324 



1 2. Myodora brevis, Stutch. New South Wales 324 



13. Myochama anomioides, Stutch. New South Wales . . , 324 



14. Chamostrea albida, Lam. sp. -. New South Wales 325 



GastrocTi&nida. 



15. Gastrochsena modiolina, Lam. Galway 325 



15a. sp. siphonal orifices, in U. Green-sand, Haldon, 



Devonshire 326 



16. mumia, Spengl. f. India , 326 



17. Clavagella bacillaris, Desh. ^. Pliocene, Sicily , 326 



18. Aspergillum vaginiferum, Lam. \. Red Sea 327 



Pholadidce. 



19. Pholas Bakeri, Desh. ^. India ; 328 



20. - (Pholadidea) papyracea, Solr. f . Brit 329 



21. - (Martesia) striata, L. W.Indies 329 



22. : (Parapholas) bisulcata, Conrad. California 329 



23. Xylophaga dorsalis, Turt. Brit 329 



24. 25. Teredina personata, Lam. London Clay, Bognor 330 



25 a. siphonal orifice 



26.*Teredo Norvegica, Spengl. Brit 329 



27. siponai end of the tube, broken to show septa. 



28. bi-pennata, Turt. (styles) Brit 330 



