Turbo. 



MOLLUSCA. 



73 



Turbo conicus. Sowerby, Min. Conch. V. p. 45, pi. 433, fig. 

 1. Fleming, Brit. An. p. 301. 



Shell ovately-conical ; body large, ventricose ; spire short' 

 consisting of four rapidly decreaising ventricose volutions, deeply 

 separated by the line of the suture, slightly depressed on their 

 upper parts, and terminating in a very acute apex ; whole shell 

 invested by numerous, very fine spiral stria;, crossed by distant, 

 very slender lines of growth ; base rounded, and provided with 

 a small and deep umbiHcus; aperture nearly circular, and slightly 

 contracted above ; outer lip thin, and even ; pillar lip not re- 

 flected on the columella. 



Found in the Green Sand of Blackdown. 



7. T. ROTUNDATUs The Rounded Turbo, pi. XXXVIII. 



fig. 39, 40. 



Turho rotundatus. Sowerby, Min. Conch. V. p. 45, pi. 433, 

 fig. 2. Fleming, Brit. An. p. 301. 



Shell ovate, subglobose, smooth, with a few longitudinal, 

 distant, nearly obsolete lines of growth ; body very large, ven- 

 tricose ; spire short, consisting of five inflated, rapidly decreas- 

 ing volutions, terminating in a sharp apex ; base moderately 

 rounded, and provided with a narrow umbilicus; aperture large, 

 suborbicular, oblique, somewhat contracted above, and equal 

 to about half the length of the shell ; outer lip plain ; inner lip 

 slightly reflected on the columella. 



Found in the Green Sand of Blackdown. 



8. T. OBTUSUS The Obtuse Turbo, pi. XXXVIII. fig. 



45, 46. 



Turho ohtusus. Sowerby, Min. Conch. VI, p. 97, pi. 531, 

 fig. 2. 



Shell conical, short ; body occupying more than half its 

 length ; spire consisting of three gradually diminishing volu- 

 tions, with somewhat flattened sides, and terminating in an 

 obtuse apex; base convex, and solid; aperture suborbicular, 

 slightly oblique ; whole surface covered with numerous fine 

 strige, exceeding twelve upon each volution, and crossed by very 

 fine, longitudinal, nearly invisible lines of growth. 



Found in the London Clay at AnclifFe. 



9. T. Tiara.— The Tiara Turbo, pi. XXXVIII. fig. 32. 

 Turho Tiara. Sowerby, Min. Conch. VI. p. 97, pi. 551, 



fig. 1. 



Shell short, conical, turban-shaped; volutions few, depressed, 

 flattened on the sides, and each crowned by about twenty large, 

 somewhat obliquely elongated knobs; body about half its 

 length ; spire consisting of six volutions, terminating in a flat- 

 tened apex ; base convex, and umbilicated. 



In the very young specimens the volutions are divested of the 

 knobs, as are also the superior volutions in the adult shell. 



Found in the Mountain Limestone, near Preston, Lan- 

 cashire. 



10. T. BicosTATUS The Double-ribbed Turbo, pi. 



XXXVII.* fig. 11, 12, 13. 



Shell short, conical ; volutions depressed ; body very large ; 

 spire very short, consisting of two volutions ; body girdled by 

 two strong, elevated, thick spiral ribs, the lower one near the 

 base, and the upper one on the superior portion of the body ; 

 top of volutions hollow; the inferior rib terminates above the 

 outer lip, and the superior one loses itself in the lower volution 

 of the spire ; aperture suborbicular, subtransverse, and very 



slightly contracted above ; outer lip thin ; inner lip slightly 

 reflected on the columella, and widening as it descends ; whole 

 shell covered with distant, strong, irregular, waved, longitudinal 

 wrinkles. 



Found by Mr. Samuel Gibson, of Hebden Bridge, in the 

 Mountain Limestone at Witherell, near Clitheroe ; and is in 

 his cabinet. 



11. T. PULCHERRiMus. — The Splendid Turbo, pi. 

 XXXVII.* fig. 14. 



Turho ? pulcherrimus. Phillips, Geo. of Yorkshire, I. p. 

 94, pi. 2, fig. 35. 



Shell pyramidal ; body considerably shorter than the spire, 

 which consists of five gradually tapering volutions, with their 

 sides somewhat flattened, terminating in an acute apex; base 

 rounded; whole shell covered with very fine, regular spiral 

 striae ; the lower and superior portions of the volutions pro- 

 vided with longitudinal ribs; the most prominent part of the 

 body is girdled by an elevated zone, consisting of small, regu- 

 larly set tubercles ; and the whole base covered by a series of 

 very small tuberculate girdles. 



This beautiful species was found by Mr. Bean, of Scar- 

 borough, in the Speeton Clay at Speeton. 



12. T. FUNicuLATUs The Rope-girdled Turbo, pi. 



XXXVIH. fig. 59. 



Turho fuiiiculatus. Phillips, Geo. of Yorkshire, p. 102, pi. 

 4, fig. 11. 



Shell short, subconic ; body large ; spire small, with few 

 volutions ; body provided with six or seven strong, elevated, 

 transverse, rope-like ribs ; base slightly flattened. 



Found in the Coralline Oolite at Malton and Learner. 



13. T. SULCOSTOMUS — The Sulcated Turbo, pi. XXXVIII. 

 fig. 60. 



Turho sulcostomus. Phillips, Geo. of Yorkshire, I. p. 112, 

 pi. 6, fig. 10. 



Shell subconic ; body large ; spire small, consisting of three 

 smooth ventricose volutions, terminating in an obtuse apex ; 

 body furnished with three or four sharp spiral costse ; outer lip 

 grooved internally. 



Found in the Kelloways Rock at Hackness, South Cave. 



14. T. L^viGATUS The Smooth Turbo, pi. XXXVIH. 



fig. 52. 



Turbo lavigatus. Phillips, Geo. of Yorkshire, I. p. 129, pi- 

 11, fig. 31. 



Shell subconic, smooth ; body large ; spire small, consisting 

 of four abruptly tapering, inflated volutions, terminating in an 

 acute apex ; surface with very indistinct, longitudinal lines of 

 growth. 



Found in the Blue Vick of the Inferior Oolite. 



15. T. UNDULATUS. — The Waved Turbo, pi. XXXVIII. 

 fig. 47. 



Turbo undulatus. Phillips, Geo. of Yorkshire, p. 134, pi. 

 13, fig. 18. 



Shell subconic; body large; spire small, consisting of three 

 or four rapidly diminishing, inflated volutions ; whole shell 

 covered with spiral, undulating, strong striae, crossed by a few 

 indistinct and broken lines of growth. 



Found in the Marlstone, Lias formation, Yorkshire. 



T 



