22 CRETACEOUS LAJVIELLIBRAKCHIA. 



M. cor-mujuimim) near Lewes. An example from Cambrai is in the d'Orbigny 

 Collection at Paris, but it is probably not the specimen figured in the ' Palcontologie 

 Fran^aise.' 



Disfrihnfidii. — (i) Zone of Tcrehraiulina of Bevendean, near Brighton.' 



(ii) Zniip of IfoJiisfrr pltiinis- of AVinehester, Lewes, Dovei', Kcnl(>y, Ciixton. 

 Chalk Rock of Boxnioor, Luton, Underwood Hall (DuUinghani), Westley 

 Waterless. 



(iii) Zone of Micrastrr (■(>r-lc-'<fii(liii«(rivm of Lewes, Dover, Purley, Strood, 

 Chatham, Swaffham- (Norfolk). 



(iv) Zone of Micr<nter cor-anr/uimnn of Winchester, Porton, AVitherington, 

 Qnidhampton, Lewes, the Sussex coast, St. Margaret's, Gravesend, Northflect, 

 Hailing Pit (South Croydon). 



(v) Zone of Marsupifcs tefffndwariiis of the coasts of Sussex, Thanct, and 

 Yorkshire. T^iutacniiiis hnml of Devizes Road, Salisbury. 



(vi) Zone of Arfiuocamax <jii<nhrihii< of East Harnham, Hurslcy (Winchester), 

 the coasts of Sussex and Yorkshire. 



(vii) Zone of Bi-lmniifiila mvcrovafa of the Dorset coast and Norwich. 



(viii) ('lialk of Trimingham. 



JiiMA (Pi.a(!I(»stiima) ciiKTACEA, uoiu. uov. Plate IV, figs. 13, 14 (I — r', 15. Plate V, 



figs. \(i,h, 2, o, A«,h. 



? 1847. Lima Mantei.i.ii, A. (VOrhujnu. V-A. Fraii9. Terr. Crt't., vol. iii, ji. 508, 



pi. ccccxxvi, figs. 3 — 5 (uou L. Man- 

 telli, Brongniart). 



V 1850. — — — Prodr. de Pal, vol. ii, p. 248. 



— — L.s:viuscuLA, J. de C. Sowcrhy, in F. Dixon. Geol. Sussex, p. 347 



(p. 382, ed. 2), pi. xxviii, fig. 14, 

 (uou L. Ireviuscvla, Sovcerby, 

 1822). 

 y 1872. — HorEKi, H. B. Geinitz. Das Elbthalgeb. iu Sachseu (Palaeontogra- 



jilupa, vol. XX, pt. 2), p. 40, pi. ix, figs. 11,12. 

 ? 1877. — — A. Frxtsch. Stud, iiu Gebiete der buhm. Kreidoformat. : II, 



Weisseuberg. u. Malnitz. Schicht., p. 134, 

 fig. 121. 



V — — Mantelli, Fritscli. Ibid., p. 134, fig. 122. 



? 1888. — — A. Peroii. L'Hist. du Terr, de Craie, p. 151. 



Description. — Shell of small convexity, oval, very inequilateral, higher than long. 



Antero- and postero-dorsal margins nearly straight, the remainder forming a 



' Also recorded from the Terebraiulina zone of South Dorset by Dr. Barrois. 

 - This may bo from the M. cor-anguinnm zone. 



