SCALA (CLATTTRUS) SUBITLATA. 537 



lias no certain connection with the British Scalas, has been figured in this memoir. 

 Should any further and more perfect specimens of cither of the shells referred to 

 be found hereafter in the Crag, it may be useful for comparison. As to the 

 relation of 8. proxima and 8. communis, M. de Boury remarks that in the former 

 the costse are more numerous, somewhat irregular and unequal, while the whorls 

 increase in size more gradually. 



Scala (Clathrus) subulata (J. Sowerby). Plate XL VII, figs. 20, 27. 



1823. Scalaria subulata, J. Sowerby, Min. Conch., vol. iv, p. 126, pi. cccxc, fig. 1. 



1842—72. Scalaria subulata, S. V. Wood, Auu. Mag. Nat. Hist. [1], vol. ix, p. 635, 1842; Mou. 



Crag Moll., pt. i, p. 93, pi. viii, fig. 18, 1848 ; 1st Suppl., pt. i, p. 98, 1872. 

 1843—81. Scalaria subulata t, Njst, Coq. foss. Terr. tert. Belg., p. 394, pi. xxxviii, fig. 8, 1843 ; Ann. 



Soc. nialac. Belg., vol. vi, p. 136, no. 302, 1871 ; Conch. Terr. tert. Belg., p. 89, pi. vi, fig. 17, 1881. 



1870. Scalaria subulata, A. Bell, Journ. de Conch., vol. xviii, p. 351, no. 370. 



1871. Scalaria foliacea, var., Jeifreys in Prestwich, Quart. Journ. Geol. Soc, vol. xxvii, p. 145; 

 S. subulata, p. 496. 



1872. Scalaria S2ibulata, A. and K. Bell, Proc. G-eol. Assoc, vol. ii, pp. 204, 210, 214. 



1874 — 92. Scalaria subulata, Yun den 'Broeck, Ann. Soc. nialac. Belg., vol. ix, pp. 187, 356, 1874; 



vol. xiv, pp. 71, 76, 1879; Bull. Soc Beige Geol., vol. vi (Memoires), pp. 123, 147, 1892. 

 1890. Scalaria subulata, C. Eeid, Plioc. Dep. Brit., p. 256. 



1896. Scalaria subulata, Bernays, Bull. Soc. Beige Geol., vol. x (Memoires), p. 129. 

 1912. Scalaria subulata, Tesch, Med. v. d. Eijks. v. Delfstoffen, no. 4, p. 70, no. 157. 

 1912. Scala (Clathrus) subulata, Cossmann, Ess. Paleoconch. compar., vol. ix, p. 37. 



Specific Gharacters. — Shell slender, turreted, elongate, subulate ; whorls about 

 10, disjoined, convex, smooth ; ornamented by fine longitudinal costse, lamelliform 

 and oblique, 8 to 10 on the last whorl, a few occasionally varicose ; suture deep ; 

 mouth subovate ; base imperforate ; outer lip thickened by the labial rib ; peristome 

 reflected, continuous. 



Dimensions. — L. 16 mm. B. 5 mm. 



Distribution. — Not known living. 



Fossil : Coralline Crag : Gedgrave, Sutton. Waltonian : Walton- 

 on-Naze, Beaumont, Little Oakley. Newbournian : Sutton. 



Casterlien (zone a Isocardia coy.), Scaldisien : Belgium. Scaldisien : Holland. 



Remarks. — This form was at first regarded by Jeffreys as a variety of 8. foliacea, 

 but afterwards, having been dredged as he believed by McAndrew off Teneriffe, 

 he reverted to Wood's original description of it as specifically distinct. Nyst 

 states {op. cit., p. 89), that the identification of the Teneriffe shell with 8. subulata 

 was, " sans doute," incorrect. The present species may be distinguished from 8. 

 foliacea by its slender and more elongate spire and the less fimbriated foliation of 

 its costse. 



M. de Boury informed me that, in his opinion, the present species is not repre- 

 sented in Italy. 



