264 



A. J. Jukes-Broicnc — 



chert, and that there are layers and lumps of light-grey siliceous 

 stone and others of calcareous stone in chert beds. The yellow sand 

 mentioned by her is, of course, merely oxidized greensand, and the 

 flinty stones on the hills are flinty cherts accumulated there as 

 insoluble remnants by the gradual detrition and destruction of the 

 chert beds. 



I propose first to give a list of the fossils which have been found 

 in the chert beds and in the greensands which underlie them. 

 Those marked S ai'e species which have actually been found in situ 

 by Mr. Ehodes or by myself, while those marked M are in other 

 collections, but are believed to have come from the chert beds. For 

 the list of sponges I am indebted to Dr. Hinde. 



LIST I. 



Fishes. 



Cephalopoda. 



Oxyrhina Mantelli, Ag. 

 Odoutaspis ... 

 Pycnodus 



Ammonites, sp. 



Belemnites, sp 



Lamellllranchiata. 

 Avicula gryphteoides, Sow. 



„ » S P 



Exogyra conica, Sow 



Inoceramus, sp. 



Lima semisulcata, Sow 



Lucina, sp. ... 



Ostrea vesiculosa, Sow. 



Pecten asper, Lam.... 



,, Galliennei, D'Orb. 



,, orbicularis, Sow 



,, (Janira) quadricostata, Sow. 



,, ,, quinquecostata, Sow. 



Folyzoa. 

 Entalophora, sp 



Annelida. 



Ditrupa, sp 



Serpula antiquata, Sow 



Verniicularia concava, Sow. 



,, umbonata(?), Sow 



Echinodermata. 

 Cardiaster f ossarius, Benett 



,, Perezii, Sism. (Brit. Mus.) 

 Discoidea subucula, Klein 

 Echinospatagus Collegnii, Sism. (Brit. Mus.) 



Epiaster Lorioli, Wright 



polygonus, D'Orb. (Bristol Mus.) 

 Holaster bevis(?), Deluc 



,, trecensis (?), Leym 



Pseudodiadema variolare (?), Brono-. 

 Salenia, sp. ... 



Chert 

 Beds. 



Lower 

 Sands. 



s s 



— s 



8 S 



S — 



S S 



s s 



s s 



s s 



s s 



s s 



