ALBIAN FOSSILS DISCOVERED AT OKEFORD FITZPAINE. 77 



tooth, embedded in matrix, has a slenderly conical and elevated 

 coronal cusp, with four small denticles on each side ; base with a 

 width about twice the height of the crown, slightly arched in the 

 centre, and having a finely striated margin. With the exception 

 of these stria? the tooth generally appears to be perfectly smooth. 



The specimen was obtained from the sandy rock occurring at the 

 base of the Hoplites interruptus Zone, and was found associated 

 with a small Nucula, probably the young form of N. pedinata. 

 Dimensions Height = 



,, 7 .,,, , .-Millimetres. 

 Width = 



RANGE OF SPECIES. Aptian to Semonian. 



LOCALITIES. Maidstone, Dover, Folkestone, Margate, Norwich, 

 &c., and from Russia, Belgium, and the Amuri Bluff of New 

 Zealand. 



MOLLUSCA Cephalopoda. 

 HAMITES, sp. 



Under this name I have included two badly-preserved specimens 

 which I am quite unable to specifically identify. One may belong 

 to Sowerby's H. attenuatus, as the shell appears to decrease in 

 diameter at' the curvature of the axis, besides being ornamented 

 with transversely oblique, regular, and elevated, costae. No 

 tubercles are present, and no septal characters are seen. 



HOPLITES INTERRUPTUS, Bruguiere. 

 Pi. iii., fig. 3. 



Langius : Historia Lapidum Figuratorum Helvetise, &c., 1708, 

 PI. 25, fig. 5, p. 98. 



Ammonites interrupta, Bruguiere : Encyclopede Methodique 

 (Vers), 1789, Vol. 1, p. 41, No. 18. 



Ammonites serratus, Parkinson : Trans. Geol. Soc. (London), 

 1819, Vol. 5, p. 57. non J. Sowerby, 1813. 



Ammonites dentatus, J. Sowerby : Mineral Conch ology, 1821, 

 Vol. 4, PI. 308, p. 3. 



Ammonites interruptus, Orbigny : Paleontologie Francaise, 

 Terrains Cretace"s, Ce"phalopodes, 1840, PI. 32, p. 211. 



