NEWTON: LOWER TERTIARY JIOLLUSCA OF THE FA YUM. 81 



FovDiations. — Lutetian (Middle Eocene) and Bartonian (Upper 

 Eocene). 



Localities. — South of Dime ; Jebel el Qatrani (H. J. L. Beadnell). 



TuRRiTELLA OprENHEiMi, Doni. mut. PI. Ill, Fig. 5. 

 Turritella carinifera, Deshayes, Descr. Coq. Foss, Paris, vol. ii, p. 273, 

 pi. xxxvi, figs. 1, 2, 1833 («o?? Lamarck),' 1822; Mayer-Eymai', 

 Palfeontographica, vol.^xxx, p. 76, pi. xxiii, fig. 8, 1883; 

 Cossmann, Bull. Inst. Egyptien, 1901, p. 181, pi. ii, figs. 5, 6; 

 Oppenlieim, Palaeontographica, vol. xxx, pt. iii, p. 248, 1906. 



Ee marks. — The specimen figured on this occasion is in a fragmentary 

 condition, with a somewhat eroded and polished exterior, although, 

 otherwise, it forms a striking example of the adult condition of this 

 species. It exhibits the oblong contour of the whorls, with their 

 slightly excavated surfaces, ornamented with equidistant spiral 

 striations of more or less granulate structure, and crossed by 

 deeply sinuous lines of growth ; the doubly margined and prominent 

 anterior carination is, likewise, most evident. Attention is principally 

 called to this shell, however, because of an alteration necessitated in 

 its specific name. Known hitherto as Turritella carinifera of Deshayes, 

 it is imperative to point out that the same designation had been 

 previously introduced into literature by Lamarck for quite a different 

 form of Turritella ; hence the proposed new name of T. Oppenheimi 

 is suggested to replace that of Deshayes, in admiration of Dr. Paul 

 Oppeuheim's researches on the older Tertiary shells of Egypt. 



Distribution. — This species occurs throughout the Eocene series of 

 the Paris Basin (see Cossmann, Ann. Soc. 11. Mai. Belgique, vol. xxiii, 

 p. 296, 1888), and in the Middle Eocene or Lutetian beds of England 

 (R. B. ]^s^ewton, Syst. List Edwards Coll. British Oligocene and Eocene 

 Jl/ollusca, British Museum, 1891, p. 205). Mayer-Eymar recorded 

 a well-preserved fragment from the island on Birket el Quriin. 

 Cossmann described it from the neighbourhood of Dime, and 

 Oppenheim has recognized the shell from similar localities, as well as 

 numerous other places in Egypt, especially in the neighbourhood of 

 Cairo and the Pyramids. 



This specimen forms one of the duplicates presented to the British 

 ^luseum (IS^atural History) by the Geological Survey of Egypt. 



Formation. — Lutetian (Middle Eocene). 



Locality. — South of Dime (H. J. L. Beadnell). 



EXPLANATION OF PLATES III AND IV. 



All figures are photograj)hed natural size. 

 Plate III. 

 Lanistes antiquus, Blanckenhorn. 

 Fid. 1. Spiral view of a large example of this species, preserved as a calcareous 

 sandstone cast. 

 ,, 2. Basal view of same specimen, showing a great umbilical depth with 

 the inner volutions. The costated remains of a small Ostreifomi 

 shell are i^resent in the matrix of the aperture. 



' Hist. Nat. Anim. sans Vert., vol. vii, p. 59, 1822. 



