TORNATELLA. 



MOLLUSCA. 



85 



3. T. cuspiDATUS— The Pointed Toinatella, pi. XLIII. 

 fig. 11, 12. 



Tornatella cuspidatus. Fleming, Brit. An. p. 336. Acteon 

 ruspidatus, Sowerby, Min. Conch. V. p. 77, pi. 455, fig. 1. 



Shell smooth, subeylindrical ; gradually contracting from the 

 centre to the base, which ends in a narrowed point ; superior 

 portion of the body volution flattened, and rather hollowed 

 around the base of the spire ; spire conical, consisting of four 

 volutions, and terminating in a sharp apex ; aperture greatly 

 elongated, extending above the body, and much contracted, 

 gradually widening as it descends ; columella provided with a 

 single plait, and an acute spiral edge above it ; outer lip slightly 

 crcnated within. 



Found in the Oolite at AnclitTe. 



-I. T. RETUsus. — The Blunted Tornatella, pi. XLIII. fig. 

 13. 



Acteon retusus. Phillips, Geo. of Yorkshire, I. p. 107, pi. 

 4, fig. 27. 



Shell subovate, smooth ; body large, vontricose ; spire small, 

 consisting of three volutions, terminating in an obtuse apex ; 

 aperture subovate; columella with two plaits; outer lip plain, 

 and rather acute. 



Found in the Calcareous Grit at Scarborough. 



5. T. ELONGATA The Elongated Tornatella, pi. XXXIII.* 



fig. 10, 11. 



Tornatella elongata. J. de C. Sowerby, Geo. Trans. IV. 

 2nd series, p. 335, pi. 11, fig. 1. Fittou, lb., p. 363. 



Shell elongated, elliptical; body large; spire short, consisting 

 of three or four volutions ; aperture elongated, contracted 

 above, and wide below ; outer lip slightly thickened ; surface 

 covered with spiral, regular furrows, crossed by longitudinal 

 stria;, which do not extend over the intervening ribs. 



Found in the Chalk Marl of the Upper Greensand, Kent. 



6. T. AFFiNis The Related Tornatella, pi. XXXIII.* 



fig. 12, 13. 



Tornatella affinis. J. de C. Sowerby, Goo. Trans. IV. 2nd 

 series, p. 343, pi. 18, fig. 9- 



Shell ovate; body large; spire short, consisting of four 

 gradually tapering volutions, terminating in an acute apex ; 

 aperture occupying about half the length of the body, ovate, 

 contracted above, and gradually widening as it descends, the 

 lower part much rounded, and terminating in a truncated base ; 

 outer lip plain; columella with one single and one double fold ; 

 surface covered by numerous, spiral grooves, crossed by many 

 longitudinal, somewhat oblique striw. 



This species has a strong resemblance to Auricula simulata, pi. 

 XLVI. fig. 40, 41, but is more elongated, more acute, and of smaller 

 size. 



Found in the Gault, Kent. 



7. T. Popii.— Pope's Tornatella, pi. XXXIII.* fig. 14, 

 15. 



Tornatella Popii. J. de C. Sowerby, Geo. Trans. I\'. 2iiil 

 series, p. 347, pi. 23. 



Shell smooth, oblong-ovate ; body large ; spire small, con- 

 sisting of about three volutions; aperture oblong, rather wide, 

 slightly contracted above, expanding below, and occupying about 

 two-thirds of the body ; columella with two plaits. 



Found in the Hastings Sand, Sussex. 



FAMILY IV._MACROSTOMA. 



Shell atiriform, with a very wide aperture, and the 

 margins disunited; destitute of a culumella or oper- 

 culum. 



Genus XLI.— PLEUROTOMARIA.— Z)c/Vawce. 



Shell turbinated, spiral, for the most part trochiform, 

 and abruptly conical, and in some species subturreted ; 

 aperture generally subquadrate, with rounded angles, in 

 others more orbicular, and flattened at the base; outer 

 lip sharp edged, with a deep slit near its junction with 

 the spire ; provided with a large umbilicus. 



1. P. ATOM ARIA The Atomed Pleurotomaria, pi. XL. 



fig. 1. 



Pleurotomaria atomaria. Phillips, Geo. of Yorkshire, II. 

 p. 227, pi. 15, fig. 11. 



Shell ovate ; body large, inflated ; spire small, consisting of 

 three tabulated, rapidly decreasing volutions, terminating in an 

 obtuse apex; two sharp spiral carinaa traverse the shell; surface 

 covered with fine, punctated, spiral, and longitudinal stria", pro- 

 ducing an obscure reticulated appearance. 



Found in the Mountain Limestone at BoUand. 



2. P. UNDULATA The Waved Pleurotomaria, pi. XL. 



fig. 2. 



Pleurotomaria undulata. Phillips, Geo. of Yorkshire, 11. 

 p. 227, pi. 15, fig. 14. 



Shell ovate ; body large, ventricose ; spire small, consisting 

 of two convex volutions, terminating in an acute apex; a single 

 broad, flat band traverses the centre of the body, and lower 

 portion of the spiral convolutions ; surface covered with lon- 

 gitudinal, undulating strife, every third one more prominent 

 than the others. 



Found in the Mountain Limestone at BoUand. 



3. P. iNcoNSPicuA The Inconspicuous Pleurotomaria, pi. 



XL. fig. 3 and 5. 



Pleurotomaria inconspicua. Phillips, Geo. of Yorkshire, 

 II. p. 227, pi. 15, fig. 8. 



Shell somewhat depressed; body very large; spire very small, 

 consisting of two flattened volutions; convex at the sides; aper- 

 ture large, transversely oval, very much expanded ; outer lip 

 plain; inner lip broadly reflected on the columella; an obscure 

 narrow band traverses the centre of the body, and base of the 

 volutions of the spire; whole surface covered with distinct, 

 undulating, longitudinal stria?. 



Found in the Mountain Limestone at Bolland. 



4. P. DEPBESSA. — The Depressed Pleurotomaria, pi. XL. 

 fig. 4. 



Pleurotomaria depressa. Phillips, Geo. of Yorkshire, II. p. 

 227, pi. 15, fig. 7. 



Shell depressed ; volutions plane above, convex and concen- 

 trically striated beneath ; with a prominent rounded band 

 investing the central portion of the body. 



Found in the Mountain Limestone, BoUaiid. 



5. P. FIBULA The Button Pleurotomaria, pi. XL. fig. 6. 



Pleurotomaria strialis. Phillips, Geo. of Yorkshire, II. p. 



227, ph 15, fig. 9. 



