FOSSARUS LINEOLATUS. 671 



1871. Fossarus clathratus, Jeffreys in Prestwich, Quart, Journ. G-eol. Soc, vol. xxvii, p. 144; F. 

 costatus, p. 495. 



1872. Fossarus costatus, A. and E. Bell, Proc. G-eol. Assoc, vol. ii, p. 203. 

 1890. Fossarus costatus, C. Eeid, Plioc. Dep. Brit,, p. 244. 



Specific Characters. — Shell small, ovato-conical ; whorls 3 or 4, convex, com- 

 pressed above, but not angulated, the last much the largest; ornamented by rather 

 prominent spiral ridges and by fine lines of growth in the interspaces ; spire short 

 with appointed apex; suture depressed; umbilicus fairly large; mouth ovate, but 

 slightly expanded, about half the total length ; outer lip thin, gently rounded. 



Dimensions. — L. 3 mm. B. 2 mm. 



Distribution. — Not known livino-. 



Fossil: Coralline Crag : Sutton. 



Remarks. — This small shell, originally described by Wood as new, both 

 generically and specifically, under the name of Phasionema sulcata, and subsequently 

 as belonging to a recent genus, Fossarus, was referred by Jeffreys to a variety of a 

 Mediterranean species, F. clathratus, Phil., and afterwards to F. costatus, Brocchi, 

 being followed as to the latter and on his authority by the brothers Bell and by 

 the late C. Reid. On the whole I am inclined to consider the Crag shell as 

 distinct under Wood's name of 1848, F. sulcatus. Chenu figures our species as 

 typical of the genus Fossarus. 



Fossarus lineolatus (S. V. Wood). Plate LIII, fig. 36. 



1842—74. Phasionema Uneolata, S. V. Wood, Aim. Mag. Nat. Hist, [1], vol. ix, p. 535, pi. v, fig. 15, 

 1842; Fossarus sulcatus, var. Uneolata, Mori. Crag Moll., pt. i, p. 121, pi. viii, figs. 23 c, 23 d, 

 1848; F. lineolatus, 1st Suppl., p. 186, 1874. 



1859. Fossarus sulcatus, Chenu, Man. Conch., vol. i, p. 302, fig. 2132. 



1871. Fossarus japonic us, Jeffreys in Prestwich, Quart, Journ. G-eol. Soc, vol. xxvii, p. 495. 



1872. Fossarus japonicus, A. and E. Bell, Proc. Geol. Assoc, vol. ii, p. 203. 



1879. Fossarus sulcatus, var. Uneolata, Cogels aud Van den Broeck, Ann. Soc. malac. Belg., vol. xiv, 



p. 71. 

 1881. Fossarus sulcatus, var. Uneolata, Nyst, Couch. Terr. tert. Belg., p. 91, pi. vi, fig. 20. 

 1892. Fossarus lineolatus, Van den Broeck, Bull. Soc. Beige Geol., vol. vi (Memoires), p. 121. 

 1895. Fossarus (Phasionema) lineolatus, Sacco, Moll. Terr. Terz. Piem., pt, xviii, p. 18. 



Specific Characters. — Shell small, ovate ; whorls 4, convex, the last much the 

 largest ; ornamented by delicate spiral ridges less numerous than in F. costatus, 

 with very fine longitudinal ridges in the interspaces ; spire short ; mouth large, 

 three-fourths the total length, with a small tooth on the inner lip ; outer lip thin 

 not scalloped. 



Dimensions. — L. 4 mm. B. 3 mm. 



Distribution. — Not known living. 



Fossil: Coralline Crag : Sutton. 



