536 MANUAL ®F THE MOLLTJSCA, 



PLATE XVII. 



* The figures marked are left valves ^(interiors). 



jLviculidce. 



Page 



1. Gervillia anceps, Desli. i.. Neocomian, Brit 418 



2. Pema epliippium, L. \. W. Indies 418 



3. Inoceramus sulcatus, Park, f . Gault, Brit 419 



Mytilidce. 



4. Mytilus smaragdinus, Chemn. \. India 420 



5. Modiola tulipa, Lam. \. Brit, 421 



6. pelagica, Fortes. |. S. Atlantic 422 



7. lithophaga, L. \. Medit 422 



8. CreneUa discors, L. Brit 422 



9. Dreissena polymorpha, PaUas. f . Brit 422 



Arcadce. 



10. Area granosa, L. f . Australia 424 



11. pexata, Say. ^. S. Carolina 424 



12. [Bysso-arca) Noae, L. f . Medit 424 



13. zebra, Sw. \. Australia 424 



14. Cucullaea concamerata, Martini. \. India 425 



15. Macrodon Hirsonensis, D'Arch. sp. |. Bath Oolite, Brit... 425 



16. *Pectunculu8 pectiniformis. Lam. f . India 425 



l7.*Limopsis airrita, Broc. sp. Crag, Suffolk 426 



18. Nucula Cohboldise, Sby. ±. Crag, Norwich 426 



19.*Nuculina miliaris, Desh. *. Eocene, Paris 427 



20.*Leda caudata, Donov. Brit 427 



21.* (Toldia) myalis, Couthouy .f. Crag, Norwich 428 



22.*Solenella Norrisii, G. Sby. A. Valparaiso 429 



23. ornata, G. Sby. sp. A. Miocene, Patagonia 429 



Triffoniada. 



24.*Trigonia costata. Park. i. Oolite, Brit 430 



25. Myophoria decussata, Miinst. sp. Trias, Tyrol 431 



26. Verticordia cardiiformis. Wood. 3. Crag, Suffolk 472 



