198 EOCENE MOLLUSCA. 



No. 129. Conus scabriculus, Solander. Tab. XXIV, fig. 9 a — c. 



Conus scabriculus, Sol. 1766. Brand., Foss. Hanton., p. 15, t. 1, fig. 21. 



— — Sow. 1821. Min. Con., vol. iii, p. 180, t. 303, figs. 1, 2. 



— — Desk. 1824-37. Descr. des coq. foss., &c, vol. ii, p. 751, t. 98, 



figs. 17, 18. 



— — lb. 1845. Lam., Hist. Nat., 2d edit., vol. ii, p. 158, No. 11. 

 _ _ jyOrb. 1850. Prod, de Paleont., vol. ii, p. 416, No. 1472. 



non — — Sism. 1847. Syn. Meth., &c, Pedemont. foss., p. 44. 



C. testa utrinque conicd, antice sub-productd, lineis concentricis, elevatis, ornatd ; spird 

 elevatd, acuminata ; lineis concentricis acutis, denticulatis, aliquando confertis, aliquando 

 distantibus ; alternis scepissime minoribus, sape inermibus : anfractibus planis, postice obtuse 

 angulatis ; marginibus sub-concavis, ad suturam granulosis : aperturd lineari, angustd, bessem 

 i 'otitis testa paullum superanti ; labro tenuissimo, leviter arcuato, postice sinuoso. 



Shell oblong, doubly conical, slightly produced at the base, and ornamented with 

 concentric raised lines ; spire elevated, pointed, terminating in a very small conical 

 pullus, formed of three smooth volutions. The concentric lines are sharp, and very 

 variable in their character ; sometimes numerous, sometimes distant, and very fre- 

 quently the alternate lines are smaller than the others. Most generally the concentric 

 lines rise, at regular intervals, into short, tooth-like tubercles, having their bases 

 prolonged, both in front and behind, into short, rounded ribs, more or less prominent 

 according to the size of the tubercles, and separated by deep, pit-like hollows. The 

 whorls, exclusive of the pullus, are six or seven in number, flat at the sides, slightly 

 contracted towards the base, obtusely angulated at the shoulder, longitudinally ridged 

 by regular conspicuous lines of growth, and bordered at the suture by a row of small 

 granulations ; the space between the shoulder and the suture is traversed by two or 

 three smooth, prominent lines. The aperture is straight, narrow, slightly emarginate 

 in front, and in length, rather more than two thirds of the whole shell ; the outer lip 

 is smooth within, thin, sharp on the edge, of a flattened elliptical form, and separated 

 from the preceding whorl by a moderately wide, but not deep, sinus. The columella 

 is slightly curved inwards. 



Not infrequently, the alternate smaller lines, where they do occur, are smooth 

 and simple ; and the same character sometimes, although very rarely, distinguishes 

 the whole transverse lineation. In the latter instances the surface of the shell between 

 the raised lines is flat and smooth, except where it is ridged by the lines of growth. 



This pretty and well-marked species is, apparently, confined to the middle eocene 

 strata; and the shells referred to it by Sismonda, from Piedmont and Turin, are 

 considered by M. D'Orbigny to belong, in fact, to Michelotte's C. ornatus. 



Size. — Axis, 4-5ths of an inch ; diameter, rather more than 3-10ths of an inch. 



Localities. — Barton. French — Monneville ''fide Desk), Chavancon (fide D' Orb.). 



