80 ALBIAN FOSSILS DISCOVERED AT OKEFORD FITZPAIXE. 



follows : " elliptical, elongated, rather blunt ; smooth, except a 

 few striae at the base ; aperture more than half the length of the 

 shell." In addition it may be stated that the spire is of gradient 

 construction, or in other words ramped at the suture ; the 

 summit, well-preserved in our specimen, shows the protocorich 

 beautifully curved inwards and slightly embedded in the spire. 

 The species, though related to Adceon Dupiniana, differs from it in 

 being rather more convex, in having a shorter aperture, and in the 

 absence of stria?, on the suture. Both forms, however, belong to 

 the genus Adceonina, though, probably on account of the basal 

 striations, M. Cossmann has referred them doubtfully to his 

 sectional name of Ovactceonina (type = Action sparsisulcata, Orb.). 

 Several examples of this species were obtained at Okeford Fitz- 

 paine. 



Dimensions Length = 7 ) ,. 



} Millimetres. 

 Breadth = 4 ) 



KANGE OF SPECIES. Albian. 

 LOCALITY. Blackdown. 



ANCHURA CARINATA, Mantell. 



Rostellaria carinafa, Mantell : Geology of Sussex, 1822, PI. 19, 

 figs. 10-14, p. 86. Orbigny : Paleontologie Francaise, Terrains 

 Cretans, Gasteropoda, 1842, PI. 207, fig. 2, p. 284. 



AncJiura carinata, Conrad : American Journ. Conchology, 1866, 

 Vol. 2, p. 102. 



Aporrliais carinata, J. S. Gardner : Geological Magazine, 1875, 

 PI. 5, fig. 1, p. 125. 



The specimen referred to this species is very imperfect, and a 

 a mere cast with only minute patches of the test remaining. 

 About four whorls of the spire are seen, the last exhibiting its 

 bicarinate character and the commencement of the prolongation 

 of the labrum, which, in well-preserved examples, terminates with 

 two ensiform projections running in opposite directions more or 

 less parallel with the axis of the shell. The long anterior canal is 

 absent in our specimen, and the central elongate tubercles 



