SCALA (SPINISCALA) OAKTiEYENSIR. 531 



unreasonable. S. aldehiana seems to be met with generally, though not very 

 abundantly, in the various localities of the Icenian Crag. Dr. Tescli has been kind 

 enough to send me some of the specimens included in his list of shells from the 

 Dutch borings under the name of 8. Treveli/ana. Tiiey belong to this form, as 

 may probably do those from Antwerp recorded by M. Van den Broeck. 



Scala (Spiniscala) oakleyensis, sp. nov. Plate XLIX, fig. 5. 



Specific Characters. — Shell of moderate size, turreted, conical ; wdiorls 7 or 8, 

 convex, disjoined, the last expanded, nearly half the total length ; ornamented by 

 about 12 thin, narrow, distant, rather oblique and nearly continuous ribs, a few of 

 them, rather larger than the others, subvaricose, the upper part widening into 

 a short spine-like projection; spire elongate, regularly tapering upwards; suture 

 deep ; mouth subcircular, angulate below ; base excavated ; basal ridge wanting. 



Dimensions. — L. 14 mm. B. 6 mm. 



Distribution. — Not reported living. 



Fossil : Waltonian Crag : Little Oakley. 



BemarJcs. — This is another specimen that M. de Boury was kind enough 

 to examine for me, but without being able to identify it with any species known to 

 him, either recent or fossil. He thought it belonged to the subgenus Spiniscala, but 

 as it was not perfect he hesitated to express a decided opinion. It comes from 

 Oakley, the prolific locality from which I have obtained so many interesting things, 

 including a number of fragmentary Scalas. Possibly, now that attention is drawn 

 to this shell, a more satisfactory example of it should be found. There may be 

 other Crag localities from wdiich, if carefully worked, equally good results might 

 be obtained as from that locality. 



Sub-genus LINCTOSCALA, de Boury, 1891. 

 Scala (Linctoscala) frondicula (S. V. Wood). Plate XLVIII, figs. 19, 20. 



1842—48. Scalaria frondicula, S. V. Wood, Ann. Mag. Nat. Hist. [1], vol. ix, p. 535, 1842; Men. 



Crag Moll., pt. i, p. 92, pi. viii, fig. 16, 1H48. 

 1843 — 81. Scalaria frondosa, Nyst, Coq. foss. Terr. tert. Belg., p. 393, pi. xxxviii, fig. 7, 1843 ; 



8 . frondicula, Ann. Soc. malac. Belg., vol. vi, p. 108, no. 118, 1871 ; Conch. Terr. tert. Belg., p. 87, 



pi. vi, fig. 15, 1881. 



1870. Scalaria frondicula, A. Bell, Journ. de Conch., vol. xviii, p. 351, no. 369. 



1871. Scalaria frondicula, Jeffreys in Prestwich, Quart. Jourii. Geol. Soc, vol. xxvii, p. 145. 



1872. Scalaria frondicula, A. and R. Bell, Proe. Geol. Assoc, vol. ii, p. 204. 



1874 — 92. Scalaria frondicula. Van den Broeck, Ann. Soc. malac. Belg., vol. ix, pp. 120 et seq., 1874; 



vol. xii, p. 70, 1877; vol. xvi, p. 76, 1879; vol. xix, p. 26, 1884; Bull. Soc Beige Geol., vol. vi 



(Memoires), pp. 123, 133, 147, 1892. 

 1876. Scalaria frondicula, Seguenza, Boll. R. Com. Geol. Ital., vol. vii, p. 98, no. 613. 

 1890. Scalaria frondicula, Carus, Prod. Faun. Medit., vol. ii, p. 293. 

 1890 — 91. Linctoscala (?) frondicula, Sacco, Boll. Soc Geol. Ital., vol. ix, p. 317, no. 5157, 1890 ; 



Scalaria (Linctoscala) frondicula, Moll. Terr, Terz. Piem., pt. ix, p. 26, pi. i, fig. 38, 1891. 



