ALVANIA MONTAGUI. 009 



1871. Bissoa crassi -striata, Ji'tt'reys in Prestwich, Quart. Juuru. Geol. Soc, vol. xxvii, p. 145. 



1872. Bissoa crassi-striata, A. and li. Bell, Proc. Geol. Assoc, vol. ii, p. 204. 

 1890. Bissoa oxtssi-striata, C. Keid, Plioc. Dep. Brit., p. 255. 



Specific Clianicfers. — Sliell small, turriculate, solid ; whorls G or 7, distinctly 

 convex; ornamented by about 12 strong, obtuse longitudinal costae which reach 

 the base of the shell, and b}' well-marked spiral ridges in the interspaces of the 

 ribs; spire elongated, ending in an acute point ; suture deep; mouth suljcircular, 

 obtusely angulate above; outer lip thickened and marginated, striated within. 



Dimcitiiioiis. — L. o'5 mm. B. 1'5 mm. 



Distrlbulioii. — Not known livino". 



Fossil: Coralline Crao- : Sutton. 



Femarks. — -This fossil from the Coralline Crag was regarded by Wood, Jeffreys 

 and the brothers Bell as a distinct species, unknown either as living or as fossil, 

 otherwise than from the English Crag. It belongs to the group known under 

 the generic or subgeneric name of Alcania, oval in form, having a short spire, 

 clathrated sculpture and a mouth internally grooved. Wood states it is an 

 abundant species at Sutton. 



Alvania Montagui (Payraudeau). Plate L, fig. 50. 



1826. Bissoa Moiitaijui, Pavraiideau, Moll, de Corse, p. Ill, pi. v, lig. 14. 



1836—44. Bissoa Monfagui, Philippi, Euuni. Moll. Sic, vol. i, p. 153, 1836; vol. ii, p. 126, 1844. 



1856. Bissoa Montacjui, Homes, Foss. Moll. Tert. Wien., vol. i, p. 569, pi. xlviii, fig. 13. 



1858. Alvania Muntacfui, H. aud A. Adams, Geu. Rec Moll., vol. i, p. 331. 



1876. Bissoa (Alvania) Montagui, Seguenza, Boll. K. Com. Geol. Ital., vol. vii, p. 102, no. 686. 



1878. Bissoa Monfagui, Reeve, Concli. Icou., vol. xx, pi. i, fig. 3. 



1884. Bissoa Montacuti, Jeffreys, Proc. Zool. Soc. Loadou, p. 122. 



1884. Bissoa Montagui, Bucquoy, Dautzeuberg et DoUfus, Moll. mar. Rouss., vol. i, p. 285, pi. xxxiii, 



figs. 1 — 6. 

 1884. Alvania Montagui, Mouterosato, Norn. Geu. e Spec. Concli. Medit., p. 58. 

 1886. Bissoa Montagui, Keudall aud R. G. Boll, Quart. Jouru. Geol. Soc, vol. xlii, p. 211. 

 1890. Bissoa (Alvania) Montagui, Cams, Prod. Fauu. Medit., vol. ii, p. 328. 

 1892. Alvania Montagui, Locard, Coq. mar. Cotes de Frauce, p. 158, fig. 136. 

 1892-98. Bissoa Montagui, A. Bell, Rep. Yorks. Phil. Soc, pp. 63, 76, pi. i, fig. 20, 1892; Proc. 



Roy. Irish Acad. [3], vol. ii, p. 629, 1893; Trans. R. Geol. Soc Cornwall, vol. xii, p. 151, pi. ii, 



fig. 11, 1898. 

 1895. Alvania Montagui, Sacco, Moll. Terr. Terz. Piem., pt. xviii, p. 23. 

 1907. Bissoa (Alvania) Montagui, Scalia, Att. Accad. Gioen. Sci. Nat. Catania [4], xx, p. 33. 



S2)eclfic Characters. — Shell small, solid, ovato-conical, whorls but slightly 

 convex ; ornamented by strong, straight, rounded costte which die out on the 

 last whorl, and by strong spiral ridges covering the base of the shell, producing 

 slight granulations at the points of contact ; suture deep, channelled ; mouth 

 oval ; outer lip thickened, sulcated within, not denticulate. 



Dluiensions. — L. 5 mm. B. 3 mm. 



