1852.] LYELL — BELGIAN TERTIARY FORMATIONS. 297 



22. Phorus, sp. nov. ? 



23. Turritellacrenulata?, iVy*^. 



24. incisa?, Al. Brongniart (Nyst). 



25. Natica ; resembling N. patula, Lamk. 



26. oUa, Marcel de Serves. 



27. Sigaretus canaliculatus ?, Soio, 



28. Cancellaria evulsa, Brander. 

 29. planispira, Nyst. 



30. cassidia?, Borson. 



31. Angistoma politum, jBosg'. 



Fusus politus, Bronn. 

 Columbella. 



32. Pleurotoma ramosa ?, 5«5^. 



33. turris?, iam^. 



34. Stoffelsii, Nyst. 



36. denticula ?, Bast, 



3Q. acuticosta?, Nyst. 



37. subcanalieulata ?, Miinst. 



38. ■ filosa ? ; named for me by M. Nyst. 



39. Cerithium crassum, Dujard. ; in M. Bosquet's collection. 



40. Terebra pertusa, var. B., Basterot. 



41. Eburna; sp. not determined ; in M. Bosquet's collection. 



42. Conus Brocchii ?, Bronn. 



43. Ancillaria obsoleta, Nyst. 



Buccinum obsoletum, Broccbi. 



44. Oliva Dufresnei, Bast. ; according to M. Nyst, but M. 



Bosquet doubts this identification, as the Bolderberg 

 species is smaller and shorter, and has numerous striae on 

 the columella. It is the most abundant shell, though 

 never quite perfect. 



45. Flabellum Edwardsianum, Bosq. 



46. avicula, Nyst {Turbinolia aviculaj MichelMti). 



A7. Lunulites rhomboidalis, Goldf. 



Although the above list comprises 47 species, so few of them are 

 in a perfect state that we cannot well compare them as a whole with 

 any recent or fossil fauna. Some of the supposed instances of agree- 

 ment, such as the large Ostrea with O. Meadii of the ' Mineral 

 Conchology' (an oolite species), are certainly erroneous. Never- 

 theless, we may at once affirm that we have here an assemblage of 

 organic remains very distinct from the more modern crag of Antwerp 

 or the more ancient Limburg beds. 



Some of the species, such as Isocardia harpa, are at present pecu- 

 liar to this locality. The Oliva Bvfresnei ? is exceedingly plentiful. 

 The genera Oliva, Conus, Ancillaria, and Cancellaria imply a warmer 

 climate than that of the Antwerp crag. 



In England we have no representative of the Bolderian formation 

 of Dumont ; which may possibly be a Miocene deposit, approaching 

 nearer in age to the faluns of Touraine than any other Belgian group. 

 The climate seems to have been not unlike that which prevailed when 

 the faluns of the Loire were deposited. 



