GASTEROPODA. 93 



upwards around the upper part of the volution— a character I do not observe in my 

 numerous specimens of that species, and the costEe are fewer in number (generally 

 twelve), and thicker. 



A Tertiary fossil, found in the beds of the Tagus, and recently described by 

 Mr. Smith (in the Quarterly Journal of the Geological Society,) under the name of 

 Sc. tenera, is perhaps the same species, its distinguishing character being a small 

 mucronation at the upper part of each rib. 



7. SCALARIA FOLIACEA. ./. SoW. Tab. VIII, fio-. 17, 



ScALARiA FOLIACEA. J. Sow. Mill. CoiicU. t. 390, fio-. 2, 1825. 



— S. Wood. Catalogue 1842. 



— G. Sow. Genera of Shells, fig. 5. 



Sc. Testa turritd, acuta, imperforatd ; anfradihus rotundatis, Iceviyatis, disjunctis 

 costatis ; costis 5—7, temibus, lamelliforniiljus, distajitibus ; ajjerturd rotundatd. 



Shell turreted, spii-e elevated; apex acute; base imperforate, whorls cylindrical, 

 smooth, and disjoined ; ribs oblique, lamelliform, thin and distant, seven in the last 

 volution ; aperture circular, peristome reflected; without a keel upon the basal volution. 



Axis, 1 inch. 



Locality. Cor. Crag, Sutton. 

 Red Crag, Sutton. 



An abundant shell in the Coralline, but very rare in the Red Crag. It difi"ers from 

 Turho pseudo scalaris, Brocchi (t. 7, f. 1), which has a prominent line upon the base of 

 the volution, though M. Philippi has given this shell as a sjTionyme to his S. pseudo 

 scalaris; the ribs also are fewer in number, and the volutions more disjoined. The 

 lamelte form a continuous rib up the spire, in an oblique or slightly spiral direction, 

 and are more especially reflected in the middle of the outer lip. 



8. ScALARIA SUBULATA. /. Soiv. Tab. VIII, fig. 1 8. 



ScALARiA SUBULATA. J. Sow. Min. Couch, t. 390, fig. 1, 1825. 



— S. Wood. Catalogue 1842. 



— Nyst. Coq. fos?. de Belg. p. 394, pi. 38, fig. 8, 1844. 



Sc. Testd turritd, eJoncjatd, sutmlatd, Iceciyafd, imperforatd; anfracfi/jus 10 — 11, 

 rotundatis, disjunctis costellatis ; costellis ofjtusis ; in anfracfu ultimo decern. 



Shell turriculate, elongate, tapering, and smooth; whorls 10 — 11, rounded or 

 cylindrical, disjoined and costated ; ribs slightly oblique, ten in the last volution ; base 

 imperforate : aperture subovate. 



Axis, \ of an inch. 



Locality. Cor. Crag, Sutton. 



This species is not so abundant as S.foliacea, from which it diS'ers in being more 

 elongate, and in tapermg gradually, with less fimbriated foliations. The volutions are 

 perfectly smooth, differing in that respect from a recent species in my possession, 

 which resembles it in all other respects, but that it is striated ; the Crag shell does not 



