218 EOCENE MOLLUSCA. 
No. 144. PLEUROTOMA RosTRATA, Solander. Tab XXVI, fig. 8 a—c. 
Movrex rostratus, Sol. 1766. Brand., Foss. Hanton., p. 21, t. 2, fig. 24. 
PLEUROTOMA ROSTRATA, Sow. 1818. Min. Con., vol. ii, p. 104, t. 146, fig. 3. 
— — De Bil. 1826. Dict. des. sci. nat., vol. xli, p. 390. 
— — Morris. 1842. Cat. Brit. Foss., p. 157. 
_— suB-RosTRATA, D’Orb. 1850. Prod. de Paléont., vol. ii, p. 359, No. 406. 
-- rostrata? Phil. 1851. Tert. Foss. Magdeb. (Palzont., vol. i, p. 64), No. 118. 
— — Morris. 1854. Cat. Brit. Foss., 2d edit., p. 270. 
Nec Pirvroroma rostrata, De Kon. 1837. Desc. des. coq. foss., &c., de Basele, Boom, &c., 
p. 24, No. 23. 
nec — — Nyst. 1843. Desc. des. coq. foss., &c., de la Belg., p. 522, t. 42, 
figs. 2, 3. 
nec — — Ib. 1843. Bull. Soc. Géol. de France, vol. xiv, p. 453. 
P. testa elongato-fusiformi, angusta, turrita, undique spiraliter lineata ; spird elevata, 
acuminata: anfractibus numerosis, convexis, in medio oblique tuberculatis ; marginibus 
posticis concavis, ad suturam aliquando paulum tncrassatis et cingulo duplict crenulato 
cinctis, aliquando simplicibus ; lineis spiralibus in margine tenuibus, ceteris elevatis, 
rotundatis, irregularibus, inequalibus, lineis incrementi per-asperatis: aperturd oblongo- 
ovali, in canali prelongo, angustato, subrecto productd; labro aliformi; sinu profundo 
mediocriter lato, in margine collocato. 
Var. antiqua. Testé latiori, breviort ; anfractibus subangulatis. 
Shell long, narrow, fusiform, turreted, having the whole surface covered with spiral 
raised lines; the spire much elevated, being nearly half the length of the whole 
shell, and pointed; the whorls are numerous (10—12 without the pullus), very 
convex, and armed near the middle with a single row of oblique tubercles, more or 
less prominent in different individuals; the posterior margins are moderately wide, 
concave, occasionally thin, and nearly smooth along the sutural edge, but more fre- 
quently slightly thickened, plicated, and ornamented with two prominent concentric 
lines, granulated by the lines of growth. The spiral lines in the middle of the posterior 
margin are close-set and very slender; over the other parts of the whorl they are pro- 
minent, rounded, irregular, unequal, small filiform lines intervening between larger 
ones; and all are very much roughened, almost granulated, by the lines of growth. 
The aperture is of an oblong, ovate form, and terminates in front in a long, rather 
narrow, and somewhat curved canal; the outer lip is roundedly arched and wing-like ; 
the sinus is deep, moderately wide, subtrigonal, and placed in the middle of the margin. 
In the specimens from Highcliff (var. antigua, fig. 8 c), the shells are wider, and 
