PLATE I. 



Nucula [Nncula] nigifera sp. nov. Holotype from St. 173. X 3- 



Niiaila [Ntccula) diapliana sp. nov. Holotype from St. 52. X 3- 



Nucula [Nucula] exodonta sp. nov. Holotype from St. 300. X 3. 



Nîicîila [Nticida] bathybia sp. nov. Holotype from St. 208. X 3- 



Nucula [Nucula) pachydonta sp. nov. Holotype from St. 178. X 3- 



Nucula [Nuc7ila) niinbosa sp. nov. Holotype from St. 211. X 3- 



Nucula [Nucula) dautsenbergi sp. nov. Holotype from St. 52. X 3- 



Nucula [Nucula) dautzenbergi sp. nov. A younger shell from St. 52. X 3» 



Nuculana [Nuculana) sibogai sp. nov. Holotype from St. 178. X 2. 



Nucidana [Nuculana) robsoni nom. nov. A spécimen from St. 4. X 3- 



Nuculana [Nuculana) procumbens sp. nov. Holotype from St. 211. X 3- 



Nuculana [Nucidana) bathybia sp. nov. Holotype from St. 178. X 3- 



Nuculana [Nuculana) approximans sp. nov. Holotype from St. 59. X 2. 



Nuculana [Thestyleda) inodica sp. nov. Holotype from St. 52. X 3- 



Nuculana [Thestyleda) inodica sp. nov. A large right valve from St. 212. X 3- 



Nuculana [Thestyleda) scalata sp. nov. Holotype from St. 300. X 2. 



Nuculana [Thestyleda) elaborata sp. nov. Holotype from St. 52. X 3- 



Nucîdana [Thestyleda) elaborata sp. nov. A right valve from St. 52. 



Nuculana [Poroleda) parallelodonta sp. nov. Holotype from St. 226. X 2. 



Nuculana {Poroleda) sibogaensis sp. nov. Left valve of Holotype from St. 178. X 2. 



Nucidana [} Ledella) discrepans sp. nov. Holotype from St. 51. X 3- 



Malletia erronea sp. nov. Holotype from St. 300. Natural size. 



Malletia erronea sp. nov. Inner view of the valves to show the hinge. Natural size. 



Malletia encrypta sp. nov. Holotype from St. 178. X 2. 



Malletia tripartita sp. nov. Holotype from St. 211. X 3- 



Neilonella dubia sp. nov. Fig. 48 is of the valve of the right Holotype and fig. 49 of 



another right valve from St. 52. X 3- 

 Neilonella schepiiiani sp. nov. Holotype from St. 221. X 3- 

 Neilonella delicatula sp. nov. Holotype from St. 211. X 3- 



Anomia [Anoviia] ac haeus Grày. Four valves of différent .shapes from St. 179. Natural size. 

 Arca [Barbatia) paulucciana Tapparone-Canefri. A shell from St. 163. Natural size. 

 Arca [Barbatia) wendti Lamy. A shell from St. 34. X 3- 

 Figs. 62, 6-^^. Arca [Barbatia) weberi sp. nov. Holotype from St. 222. X 2. 



Figs. 



I, 



2. 



Figs. 



3. 



4- 



Figs. 



5. 



6. 



Figs. 



7. 



8. 



Figs. 



9> 



10. 



Figs. 



1 1, 



12. 



Figs. 



13. 



14. 



Figs. 



■5. 



16. 



Figs. 



17. 



18. 



Figs. 



19. 



20. 



Figs. 



21, 



22. 



Figs. 



23> 



24. 



Figs. 



25. 



26. 



Figs. 



27. 



28. 



Fig. 



29. 





Figs. 



30, 



31- 



Figs. 



32, 



33- 



Fig. 



34- 





Figs. 



35. 



36. 



Fig. 



n- 





Figs. 



38, 



39- 



Figs. 



40, 



41. 



Figs. 



42, 



43- 



Figs. 



44> 



45- 



Figs. 



46, 



47- 



Figs. 



48. 



49. 



Figs. 



50, 



51- 



Figs. 



52, 



53- 



Figs. 



54- 



-57 



Figs. 



58. 



59- 



Figs. 



60, 



61. 



