536 MANUAL OF THE MOLLTJSCA, 



PLATE XYII. 



* The figtires marked are left valves" (interiors). 



Aviculidcs. 



Page 



1. Gervillia anceps, Desh. 4. Neocomian, Brit 418 



2. Perna epliippium, L. \. "W.Indies 418 



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



MytilidcB. 



4. Mytilus smaragdmus, Clienm. \. India 420 



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



6. pelagica, Forbes. -J. S. Atlantic 422 



7. lithopliaga, L. i. Medit 422 



8. Crenella discors, L. Brit 422 



9. Dreissena polymorplia, Pallas, f . Brit 422 



Arcadce. 



10. Area granosa, L. f . Australia 424 



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



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



13, zebra, Sw. J. Australia 424 



14. Cucullgea concamerata, Martini. \. India 425 



15. Macrodon Hirsonensis, D'Arcb. sp. J. Batb Oolite, Brit. . . 425 



16. *Pectunculus pectiniformis. Lam. f . India , 425 



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



18. Nucula Cobboldiee, Sby. ±. Crag, Norwicb 426 



19.*]Sruculina miliaris, Desb. |.. Eocene, Paris 427 



20.*Leda caudata, Donov. Brit 427 



21.* (Yoldia) myalis, Coutbouy .f. Crag, Norwicb 428 



22.*Solenella Norrisii, G. Sby. -|. Valparaiso 429 



23. — ornata, G. Sby. sp. |-. Miocene, Patagonia 429 



Tnyoniadcs. 



^. Oolite, '. 



25. Myopboria decussata, Mlinst. sp. Trias, Tyrol 431 



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



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



