50 R. BULLEN NEWTON on 



Turritella cf. sulcifera, Deshayes. 



PLATE 5, fig. 7. 

 Turritella sulcifera. 



Deshayes : Desc. Coq. Foss. Paris, 1832, Vol. 2, p. 278, pi. 35, figs. 5, 6, pi. 36, figs. 3, 4, pi. 37, figs. 19, 20. 



REMARKS. This is an abundant shell in the Nigerian deposits, being of 

 small size when compared with the rather giant forms of the above species as 

 occur in the European Eocene deposits. The specimen figured is one of 

 maximum dimensions showing an altitude of 39 and a diameter of 1 1 millimetres. 

 The axis is composed of 16 whorls of convex character at the centre with an 

 obliquity dipping down at each end to a moderately deep suture. Ornamentation 

 comprises about 1 2 fine spiral ridges with occasional finer lines between. The 

 spiral ridges are pretty generally equi-distant although in the antero-peripheral 

 region they are a little more separated with the result that the sulcations are 

 wider and more prominent. The whole of this sculpture is crossed by obscure, 

 microscopically fine, longitudinal striations which are more or less sinuous or 

 curved. Although of much smaller size this shell not only resembles T. siilcifera 

 in its elongate, narrow and many whorled spire from the Eocene but in like 

 characters it approaches some recent forms, such as T. terebra, Linnaeus and 

 T. spectrum of Reeve now existing in Eastern seas. The Nigerian shell 

 bears a somewhat similar relationship to Cossmann's T. boghosi from the 

 Lutetian of Egypt (Bull. Inst. Egypt, 1901, Ser. 4, No. i, part 6, pi. 2, figs. 9-11, 

 p. 12), Oppenheim's figures of that species being rather better than the original 

 (Palaeontographica, 1906, Vol. 30, part. 3, pi. 23, figs, n, 12). 



DISTRIBUTION. Lutetian-Bartonian, Europe. 

 OCCURRENCE Cuttings Nos. 5, 6, 10, n, 12, 13, 14, 15. 

 COLLECTOR. Mr. Kitson. 



Family EPITONIID^ ( = Scalid). 

 Acrilla of. affinis (Deshayes). 



PLATE 3, figs. 10-12. 

 Scalaria affinis: 



Deshayes : Desc. Anim. Sans Vert. Suppl. Coq. Foss. Paris, 1861, Vol. 2, p. 339, pi. 12, figs. 4, 5. 

 Acrilla affinis : 



Cossmann : Ann. Soc. R. Mai. Belgique, 1888, Vol. 23, p. 134. 



REMARKS. Some remarkable good fragments of a Scaliform shell are 

 included under this determination, the longer specimen figured with imperfect 



